region selector: fix dismiss button

dots/.config/quickshell/ii/modules/regionSelector/OptionsToolbar.qml

@@ -20,6 +20,8 @@ Toolbar {
     // Use a synchronizer on these
     property var action
     property var selectionMode
+    // Signals
+    signal dismiss()
 
     MaterialCookie {
         Layout.fillHeight: true

dots/.config/quickshell/ii/modules/regionSelector/RegionSelection.qml

@@ -507,6 +507,8 @@ PanelWindow {
                 Synchronizer on selectionMode {
                     property alias source: root.selectionMode
                 }
+
+                onDismiss: root.dismiss();
             }
         }
     }