The invisible GTK+ windows to handle drag and drop are not disposed of correctly
Submitted by bro..@..il.com
Link to original bug (#790669)
Description
Moving dockable dialogs creates an invisible drag & drop handler window for each dialog window. These handler windows are not disposed of along with the dialog window when it is closed. Over time, these useless D&D handler windows accumulate.
To investigate: [Start GIMP in C# as System.Diagnostics.Process and] for each Thread in process.Threads run EnumThreadWindows (see user32.dll/pinvoke) to get all windows registered by the Process.
Version: 2.8.18