[PT Run] Fix some keyboard issues on plugin (#13490)

* Don't use enter for accelerator keys in results

Enter is already used to select commands in the context menu in the
result entries.

* Don't crash when trying to show a tooltip

* Clear hanging tooltips when keyboard navigating

* Starting/stopping service on Enter

src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Registry/Helper/ContextMenuHelper.cs

@@ -75,11 +75,12 @@ namespace Microsoft.PowerToys.Run.Plugin.Registry.Helper
             list.Add(new ContextMenuResult
             {
                 AcceleratorKey = Key.Enter,
+                AcceleratorModifiers = ModifierKeys.Control,
                 Action = _ => TryToOpenInRegistryEditor(entry),
                 FontFamily = "Segoe MDL2 Assets",
                 Glyph = "\xE8A7",                           // E8A7 => Symbol: OpenInNewWindow
                 PluginName = assemblyName,
-                Title = $"{Resources.OpenKeyInRegistryEditor} (Enter)",
+                Title = $"{Resources.OpenKeyInRegistryEditor} (Ctrl+Enter)",
             });
 
             return list;