dankbar: add a mask while popouts are open

- Retains ability to click items on the bar, while another is open

quickshell/Common/TrayMenuManager.qml

@@ -0,0 +1,54 @@
+pragma Singleton
+
+import Quickshell
+import QtQuick
+
+Singleton {
+    id: root
+
+    property var activeOverflowMenus: ({})
+    property var activeTrayMenus: ({})
+
+    function registerOverflowMenu(screenName, menuOpenBinding) {
+        if (!screenName) return
+        activeOverflowMenus[screenName] = menuOpenBinding
+    }
+
+    function unregisterOverflowMenu(screenName) {
+        if (!screenName) return
+        delete activeOverflowMenus[screenName]
+    }
+
+    function registerTrayMenu(screenName, closeCallback) {
+        if (!screenName) return
+        activeTrayMenus[screenName] = closeCallback
+    }
+
+    function unregisterTrayMenu(screenName) {
+        if (!screenName) return
+        delete activeTrayMenus[screenName]
+    }
+
+    function closeOverflowMenus() {
+        for (const screenName in activeOverflowMenus) {
+            const menuBinding = activeOverflowMenus[screenName]
+            if (menuBinding && menuBinding.close) {
+                menuBinding.close()
+            }
+        }
+    }
+
+    function closeTrayMenus() {
+        for (const screenName in activeTrayMenus) {
+            const closeCallback = activeTrayMenus[screenName]
+            if (closeCallback) {
+                closeCallback()
+            }
+        }
+    }
+
+    function closeAllMenus() {
+        closeOverflowMenus()
+        closeTrayMenus()
+    }
+}