debug: smoothe out the d&d for action bar

src/vs/workbench/parts/debug/browser/debugActionsWidget.ts

@@ -105,7 +105,7 @@ export class DebugActionsWidget implements wbext.IWorkbenchContribution {
 
 	private setXCoordinate(x: number): void {
 		const halfWidgetWidth = this.$el.getHTMLElement().clientWidth / 2;
-		x = x + halfWidgetWidth - 12; // take into account half the size of the widget
+		x = x + halfWidgetWidth - 16; // take into account half the size of the widget
 		x = Math.max(148, x); // do not allow the widget to overflow on the left
 		x = Math.min(x, window.innerWidth - halfWidgetWidth); // do not allow the widget to overflow on the right
 		this.$el.style('left', `${x}px`);