Renaming controller to migration service and other bug fixes/ validations. (#14751)

* - Added coming soon message for learn more.
- Potential fix for learn more message

* Renaming of controller to sqlMigrationService

* Surfacing some errors
-Azure account is stale error
-Migration Service creation error.

* Adding refresh azure token validation.

* Fixing some errors pointed during PR
-Fixing property names
-Fixing count

* Fixing migration status
- Adding special error handling for resource not found error
- Deleting unfound migrations from local cache
- Using prefetched migration status for view all

Misc fixes:
- Using SQL server version name instead of number
- Fixing Icons on sku recommendation page
- Fixing table column width in cutover dialog
- Adding spinner button to refresh.

* Fixing all strings in migration service page and dialog

* fixed a string error in create service dialog

extensions/sql-migration/src/wizard/accountsSelectionPage.ts

@@ -47,6 +47,15 @@ export class AccountsSelectionPage extends MigrationWizardPage {
 					};
 					return false;
 				}
+				if (this.migrationStateModel._azureAccount?.isStale) {
+					this.wizard.message = {
+						text: constants.ACCOUNT_STALE_ERROR(this.migrationStateModel._azureAccount)
+					};
+					return false;
+				}
+				this.wizard.message = {
+					text: ''
+				};
 				return true;
 			}).component();
 
@@ -69,7 +78,7 @@ export class AccountsSelectionPage extends MigrationWizardPage {
 				this.migrationStateModel._subscriptions = undefined!;
 				this.migrationStateModel._targetSubscription = undefined!;
 				this.migrationStateModel._databaseBackup.subscription = undefined!;
-
+				this._azureAccountsDropdown.validate();
 			}
 		});
 
@@ -83,6 +92,9 @@ export class AccountsSelectionPage extends MigrationWizardPage {
 		linkAccountButton.onDidClick(async (event) => {
 			await vscode.commands.executeCommand('workbench.actions.modal.linkedAccount');
 			await this.populateAzureAccountsDropdown();
+			this.wizard.message = {
+				text: ''
+			};
 		});
 
 		const flexContainer = view.modelBuilder.flexContainer()
@@ -155,6 +167,15 @@ export class AccountsSelectionPage extends MigrationWizardPage {
 	}
 
 	public async onPageEnter(): Promise<void> {
+		this.wizard.registerNavigationValidator(pageChangeInfo => {
+			if (this.migrationStateModel._azureAccount.isStale === true) {
+				this.wizard.message = {
+					text: constants.ACCOUNT_STALE_ERROR(this.migrationStateModel._azureAccount)
+				};
+				return false;
+			}
+			return true;
+		});
 	}
 
 	public async onPageLeave(): Promise<void> {