🐛 show current scm provider in viewlet title

fixes #23437

src/vs/workbench/parts/scm/electron-browser/scmViewlet.ts

@@ -360,6 +360,17 @@ export class SCMViewlet extends Viewlet {
 			.done(undefined, onUnexpectedError);
 	}
 
+	getTitle(): string {
+		const title = localize('source control', "Source Control");
+		const providerLabel = this.scmService.activeProvider && this.scmService.activeProvider.label;
+
+		if (providerLabel) {
+			return localize('viewletTitle', "{0}: {1}", title, providerLabel);
+		} else {
+			return title;
+		}
+	}
+
 	getActions(): IAction[] {
 		return this.menus.getTitleActions();
 	}