Add connect tab for new quick start (#1273)

* Add connect tab

* Error handling

* Add button to open quick start blade

* Handle scenario where user don't have write access

src/Contracts/ExplorerContracts.ts

@@ -34,6 +34,7 @@ export enum MessageTypes {
   CreateSparkPool,
   RefreshDatabaseAccount,
   CloseTab,
+  OpenQuickstartBlade,
 }
 
 export { Versions, ActionContracts, Diagnostics };