Small tweaks for post edit widget (#233431)

- Use button colors so it stands out more

- Make sure cancellation returns focus to the editor

src/vs/editor/contrib/dropOrPasteInto/browser/postEditWidget.css

@@ -7,7 +7,8 @@
 	box-shadow: 0 0 8px 2px var(--vscode-widget-shadow);
 	border: 1px solid var(--vscode-widget-border, transparent);
 	border-radius: 4px;
-	background-color: var(--vscode-editorWidget-background);
+	color: var(--vscode-button-foreground);
+	background-color: var(--vscode-button-background);
 	overflow: hidden;
 }
 
@@ -18,7 +19,7 @@
 }
 
 .post-edit-widget .monaco-button:hover {
-	background-color: var(--vscode-button-secondaryHoverBackground) !important;
+	background-color: var(--vscode-button-hoverBackground) !important;
 }
 
 .post-edit-widget .monaco-button .codicon {

src/vs/editor/contrib/dropOrPasteInto/browser/postEditWidget.ts

@@ -132,7 +132,9 @@ class PostEditWidget<T extends DocumentPasteEdit | DocumentDropEdit> extends Dis
 				};
 			})
 		], {
-			onHide: () => { },
+			onHide: () => {
+				this.editor.focus();
+			},
 			onSelect: (item) => {
 				this._actionWidgetService.hide(false);