Clipboard gets cleared whenever dillo closes

[Mineblock01]

Whenever you copy something from dillo and close the window the clipboard clears, preserving neither what you copied nor what was already in it.
Ideally whenever dillo closes the clipboard stays inact.

Version: Idk, I compiled from git, judging from it's behavior this (#432) is the last pr that I got.
OS: Linux mint 22.1, Mate DE