* fixed context for data explorer
* added more files
* initial servers and database context menu actions finished
* added all actions for servers and databases with correct conditions
* added nodetype and nodelabel for subtype actions
* added nodeinfo logic to oe shim
* fixed context for cms
* added all scripting actions to data explorer
* review comments
* fix import
* fix correct context key
* removed unused import
* separate PR for commands and menus added
* rename mssql context menu nodes
* remove command id constants
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