Describe the bug
When the chat window opens on Android, it uses the fullscreen and does not allow to return (close) the window to get back to the main dialog.

To Reproduce
Open the app on Android and open the Chat window
When using a server that has "license" enabled, you automatically get the chat window displayed and cannot even the app at all.

Expected behavior
A close option should be available to the Chat window on Android device (perhaps on iOS as well).
The default x (available in other platforms) does not show on Android.

Operating system
Android 10

Version of Jamulus
3.8.0rc1