Position tree markdown hovers with mouse x

src/vs/workbench/contrib/views/browser/treeView.ts

@@ -38,7 +38,7 @@ import { FuzzyScore, createMatches } from 'vs/base/common/filters';
 import { CollapseAllAction } from 'vs/base/browser/ui/tree/treeDefaults';
 import { isFalsyOrWhitespace } from 'vs/base/common/strings';
 import { SIDE_BAR_BACKGROUND, PANEL_BACKGROUND } from 'vs/workbench/common/theme';
-import { IHoverService, IHoverOptions } from 'vs/workbench/services/hover/browser/hover';
+import { IHoverService, IHoverOptions, IHoverTarget } from 'vs/workbench/services/hover/browser/hover';
 import { ActionViewItem } from 'vs/base/browser/ui/actionbar/actionViewItems';
 
 class Root implements ITreeItem {
@@ -829,8 +829,13 @@ class TreeRenderer extends Disposable implements ITreeRenderer<ITreeItem, FuzzyS
 				const tooltip = resolvableNode.tooltip ?? label;
 				if (isHovering && tooltip) {
 					if (!hoverOptions) {
-						hoverOptions = { text: isString(tooltip) ? { value: tooltip } : tooltip, target: this };
+						const target: IHoverTarget = {
+							targetElements: [this],
+							dispose: () => { }
+						};
+						hoverOptions = { text: isString(tooltip) ? { value: tooltip } : tooltip, target };
 					}
+					(<IHoverTarget>hoverOptions.target).x = e.x;
 					hoverService.showHover(hoverOptions);
 				}
 				this.removeEventListener(DOM.EventType.MOUSE_LEAVE, mouseLeave);