explorer: fix subpixel AA

related to #84715

Author: joaomoreno

src/vs/workbench/contrib/files/browser/views/explorerView.ts

@@ -54,6 +54,7 @@ import { Event } from 'vs/base/common/event';
 import { attachStyler, IColorMapping } from 'vs/platform/theme/common/styler';
 import { ColorValue, listDropBackground } from 'vs/platform/theme/common/colorRegistry';
 import { Color } from 'vs/base/common/color';
+import { SIDE_BAR_BACKGROUND } from 'vs/workbench/common/theme';
 
 interface IExplorerViewColors extends IColorMapping {
 	listDropBackground?: ColorValue | undefined;
@@ -381,7 +382,10 @@ export class ExplorerView extends ViewletPanel {
 			sorter: this.instantiationService.createInstance(FileSorter),
 			dnd: this.instantiationService.createInstance(FileDragAndDrop),
 			autoExpandSingleChildren: true,
-			additionalScrollHeight: ExplorerDelegate.ITEM_HEIGHT
+			additionalScrollHeight: ExplorerDelegate.ITEM_HEIGHT,
+			overrideStyles: {
+				listBackground: SIDE_BAR_BACKGROUND
+			}
 		});
 		this._register(this.tree);