* first set of changes to experiment the registration of cms related apis
* Adding cms service entry to workbench
* Adding basic functionality for add remove reg servers and group
* Returning relative path as part of RegServerResult as string
* Removing the cms apis from core. Having mssql extension expose them for cms extension
* Propogating the backend name changes to apis
* Fixing some missing sqlops references
* Adding a sqltools service version with CMS apis available
* Merge from vscode 37cb23d3dd4f9433d56d4ba5ea3203580719a0bd
* fix issues with merges
* bump node version in azpipe
* replace license headers
* remove duplicate launch task
* fix build errors
* fix build errors
* fix tslint issues
* working through package and linux build issues
* more work
* wip
* fix packaged builds
* working through linux build errors
* wip
* wip
* wip
* fix mac and linux file limits
* iterate linux pipeline
* disable editor typing
* revert series to parallel
* remove optimize vscode from linux
* fix linting issues
* revert testing change
* add work round for new node
* readd packaging for extensions
* fix issue with angular not resolving decorator dependencies
* adding context
* apply extension changes
* shimming disconnect
* add data explorer context menu and add disconnect to it
* clean up shim code; better handle errors
* remove tpromise
* simplify code
* add node context on data explorer
* formatting
* add new Query action
* fix various errors with how the context menus work
* add manage and new query
* add refresh command
* formatting
* Fix#4029 Ensure changeKernels always resolves, even in error states
This is necessary to unblock reverting the kernel on canceling Python install
- startSession now correctly sets up kernel information, since a kernel is loaded there.
- Remove call to change kernel on session initialize. This isn't needed due to refactor
- Handle kernel change failure by attempting to fall back to old kernel
- ExtensionHost $startNewSession now ensures errors are sent across the wire.
- Update AttachTo and Kernel dropdowns so they handle kernel being available. This is needed since other changes mean the session is likely ready before these get going
* Fix to handle python cancel and load existing scenarios
- Made changes to handle failure flow when Python dialog is canceled
- Made changes to handle initial load fail. Kernel and Attach To dropdowns show No Kernel / None and you can choose a kernel
- Added error wrapping in ext host so that string errors make it across and aren't lost.
* Fix#4452 Notebook is reloaded with wrong kernel
- Await all extension registration before getting providers and providerId
To do this, we need to await way up in the NotebookInput, and promise the model that we'll have values eventually
* change shutdown to use proper notification
* change to use storage service
* remove unused imports
* fix test
* change shutdown methods to private
* remove unusde imports
* fix tests
* formatting
* #4339: Kernel change event occurs after model load
* #4347: Code cleanup - Notebooks Save
* Remove save method from sqlops
* Adding save method to api's
* Adding save method to ext host
* Misc change
* Fix#4356 New Notebook from connection doesn't connect
Fix new notebook error by passing profile instead of ID.
- I could've just sent the ID over, but this fix sets the stage for disconnected connections to work (since we have enough info to properly connect).
- There's a bug in NotebookModel blocking the disconnected connection part working, but Yurong's in progress fixes will unblock this. Hence checking in as-is and working to properly unblock once that's in.
* Support connection profile in commandline service
- Added new context API for things that want to work on commandline and object explorer
- Refactored commandlineservice slightly to be async & have a simpler execution flow (far fewer if/else statements)
* Fix unit tests
- Fixed 2 issues raised by tests (sholdn't do new query if no profile passed, shouldn't error on new query failing)
- Updated unit tests to pass as expected given changes to the APIs.
* Start single client session based on the default kernel or saved kernel in NB.
* Added kernel displayName to standardKernel.
Modified name to allign wtih Juptyer Kernel.name.
So we can show the displayName during startup and use the name to start the session.
* Change session.OnSessionReady event in KernelDropDown
* Added model.KernelChnaged for switching kernel in the same provider
* Fixed session.Ready sequence
* Fixed merge issues
* Solve merged issue
* Fixed wrong kernel name in saved NB
* Added new event in Model to notify kernel change.
Toolbar depends on ModelReady to load
* Change attachTo to wait for ModelReady like KenelDropDown
* sanitizeSavedKernelInfo to fix invalid kernel and display_name. For example: PySpark1111 and PySpark 1111
* Added _contextsChangingEmitter to change loadContext msg when changing kernel
* Resolve PR comments
* check to see whether options is available
* removing options state and using _modelOptions
* removed additional space
* making options getter private as not intended to expose
* adding context
* apply extension changes
* shimming disconnect
* add data explorer context menu and add disconnect to it
* clean up shim code; better handle errors
* remove tpromise
* simplify code
* add node context on data explorer
* formatting
* fix various errors with how the context menus work
* adding context
* apply extension changes
* shimming disconnect
* add data explorer context menu and add disconnect to it
* clean up shim code; better handle errors
* remove tpromise
* simplify code
* Add azdata.d.ts for new extensibility APIs
* Update azdata typing files for connection API proposal
* Add implementation for azdata module
* Fix build break in agent
- Fixes#4129 Overlapping command help windows in notebook
- Do not show parameter hints for inactive cells, to avoid them hanging around when no longer selected
- Fixes#4116 Notebooks: Intellisense Doesn't Work using Add New Connection
- Move connect/disconnect logic to 1 place (code component) instead of 2
- Handle the case where you connect after choosing active cell. We now hook to the event and update connection
- Fix issues in sql session manager where result outputs 0 rows. This was failing to show the empty resultset contents, which is a regression vs. query editor. It also put unhandled error on the debug console
- Fix#3913 Notebook: words selected in other cells should be unselected on cell change
Note: after fix, now looks as follows. Need to do follow up to get correct grid min height

* added initial data explorer viewlet
* added dataexplorer contribution point
* removed test view
* remove unused imports
* inital data source, needs work
* add shim for ext host
* formatting
* making the necessary changes to use OE for tree view; need to look at TreeUpdateUtils.connectAndCreateOeSession
* formatting
* shimming oe more
* update to add correct context
* working cross provider; need to fix connection
* connection works but it adds the connection to the oe for some reason
* formatting
* add custom connection dialog code path
* hashing between trees
* added flag and tests
* add id maps to handle multiple nodepaths
* add necessary car edit parts
* keep current behavior in prodc
* fix tests
* address comments
* update comments to be more informative
* finish merge
* update comments
* fix whitespace