Benjind/schema compare add aria label (#6767)

* Adds button extension for explicitly setting aria-label, in case the label is not screen-reader friendly

* Explicitly set aria-label for ellipsis buttons in SchemaCompare

* Changing localize call to double-quotes

* Removes unused getter for ariaLabel

src/sql/base/browser/ui/button/button.ts

@@ -43,6 +43,10 @@ export class Button extends vsButton {
 		this.element.title = value;
 	}
 
+	public set ariaLabel(value: string) {
+		this.element.setAttribute('aria-label', value);
+	}
+
 	public setHeight(value: string) {
 		this.element.style.height = value;
 	}