Schema compare Icon and other fixes (#6009)

* Changes to 1. Enable Icon for Schema Compare model view editor 2. Set context setting in editable drop down 3. Fix a console error

* new icons

* Changes as per PR comments

* Adding PR comments

* Fixing a spelling mistake

src/sql/azdata.proposed.d.ts

@@ -3992,6 +3992,13 @@ declare module 'azdata' {
 		 * Does this model view editor support save?
 		 */
 		readonly supportsSave?: boolean;
+
+		/**
+		 * Resource name for this editor
+		 * File icons might depend on file extension, language id or resource name
+		 * Resource name field needs to be set explitly if file icon for a particular Model View Editor depends on editor resource name
+		 */
+		readonly resourceName?: string;
 	}
 
 	export enum DataProviderType {