backend API to create a launcher

src/public/app/widgets/spacer.js

@@ -1,4 +1,6 @@
 import BasicWidget from "./basic_widget.js";
+import contextMenu from "../menus/context_menu.js";
+import appContext from "../components/app_context.js";
 
 const TPL = `<div class="spacer"></div>`;
 
@@ -15,5 +17,20 @@ export default class SpacerWidget extends BasicWidget {
         this.$widget.css("flex-basis", this.baseSize);
         this.$widget.css("flex-grow", this.growthFactor);
         this.$widget.css("flex-shrink", 1000);
+
+        this.$widget.on("contextmenu", e => {
+            this.$widget.tooltip("hide");
+
+            contextMenu.show({
+                x: e.pageX,
+                y: e.pageY,
+                items: [
+                    {title: "Configure Launchbar", command: "showLaunchBarSubtree", uiIcon: "bx bx-sidebar"}
+                ],
+                selectMenuItemHandler: ({command}) => {
+                    appContext.triggerCommand(command);
+                }
+            });
+        });
     }
 }