fix: window manager called on Android & bugfix etc.

flutter/lib/common.dart

@@ -336,6 +336,9 @@ closeConnection({String? id}) {
 }
 
 void window_on_top(int? id) {
+  if (!isDesktop) {
+    return;
+  }
   if (id == null) {
     // main window
     windowManager.restore();

flutter/lib/desktop/widgets/remote_menubar.dart

@@ -769,7 +769,7 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
             : MenuButton(
                 icon: _getVoiceCallIcon(),
                 tooltip: translate(tooltipText),
-                onPressed: () => bind.sessionRequestVoiceCall(id: widget.id),
+                onPressed: () => bind.sessionCloseVoiceCall(id: widget.id),
                 color: _MenubarTheme.redColor,
                 hoverColor: _MenubarTheme.hoverRedColor,
               );