fixes microsoft#211062 (microsoft#211160)

Author: joaomoreno

src/vs/workbench/browser/parts/sidebar/sidebarPart.ts

@@ -43,6 +43,7 @@ export class SidebarPart extends AbstractPaneCompositePart {
 	readonly maximumWidth: number = Number.POSITIVE_INFINITY;
 	readonly minimumHeight: number = 0;
 	readonly maximumHeight: number = Number.POSITIVE_INFINITY;
+	override get snap(): boolean { return true; }
 
 	readonly priority: LayoutPriority = LayoutPriority.Low;