Wizard message UI improvement (#2971)

* improve the wizard message experience - WIP

* undo gitignorechanges

* fix expand button issue

* fix the cursor issue

* use flex to control height

* toggle message detail support

* apply style

* new images

* use template string

* address comments

src/sql/workbench/api/common/sqlExtHostTypes.ts

@@ -245,6 +245,7 @@ export enum MessageLevel {
 export interface DialogMessage {
 	text: string;
 	level?: MessageLevel;
+	description?: string;
 }
 
 /// Card-related APIs that need to be here to avoid early load issues