Adding database specific settings, cancel migration and other dark UI fixes (#14626)

* Made dashboard dark ui compat

* foundations for sql vm

* WIP

* Added cancel migration
Added refresh migraiton table
Added multi db config

* disabling cancel migration button if the migration is not in progress.

* Addressing some PR based coments
- Removing (s) from loc strings
- Adding return type to cancel migration
- removing _ from public vars
- localizing strings
- Adding name to dialogs for telemetry

* Adding todo comment for offline mode

extensions/sql-migration/src/dialog/migrationCutover/migrationCutoverDialogModel.ts

@@ -3,7 +3,7 @@
  *  Licensed under the Source EULA. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { getMigrationStatus, DatabaseMigration, startMigrationCutover } from '../../api/azure';
+import { getMigrationStatus, DatabaseMigration, startMigrationCutover, stopMigration } from '../../api/azure';
 import { MigrationContext } from '../../models/migrationLocalStorage';
 
 
@@ -36,4 +36,19 @@ export class MigrationCutoverDialogModel {
 		}
 		return undefined!;
 	}
+
+	public async cancelMigration(): Promise<void> {
+		try {
+			if (this.migrationStatus) {
+				await stopMigration(
+					this._migration.azureAccount,
+					this._migration.subscription,
+					this.migrationStatus
+				);
+			}
+		} catch (error) {
+			console.log(error);
+		}
+		return undefined!;
+	}
 }