introduce persistent states (persistence to be added)

.config/quickshell/modules/common/PersistentStates.qml

@@ -0,0 +1,13 @@
+import QtQuick
+import Quickshell
+pragma Singleton
+pragma ComponentBehavior: Bound
+
+Singleton {
+    property QtObject sidebar: QtObject {
+        property QtObject bottomGroup: QtObject {
+            property bool collapsed: false
+        }
+    }
+
+}