[Linux] When calling the plugin before `runApp`, 'GDK_IS_WINDOW (window)' failed'

[bdlukaa]

When calling the plugin before runApp on GDK/Linux, the following assertion fails:

Gdk-CRITICAL **: 11:45:31.985: gdk_window_get_state: assertion 'GDK_IS_WINDOW (window)' failed

Additional info

• https://github.com/leanflutter/window_manager/blob/8caf178456968fee5ee82dd90d95a01dd4b1137b/linux/window_manager_plugin.cc#L596
• https://stackoverflow.com/questions/54144406/stack7229-gdk-critical-110922-221-gdk-window-get-origin-assertion-g

[wanghongenpin]

+1

[ujwalbasnet1]

+1