closing panes

src/public/app/widgets/buttons/create_pane_button.js

@@ -0,0 +1,12 @@
+import ButtonWidget from "./button_widget.js";
+
+export default class CreatePaneButton extends ButtonWidget {
+    constructor() {
+        super();
+
+        this.icon("bx-window-open bx-rotate-90")
+            .title("Create new pane")
+            .titlePlacement("bottom")
+            .onClick(widget => widget.triggerCommand("openNewPane", { ntxId: widget.getNtxId() }));
+    }
+}