The source project of this merge request has been removed.
We have to work around the limitation of GtkDialogs with CSD not having the min and max buttons. This is done by changing the type-hint from "dialog" to "normal".
As a result of that change, we also have to manually center the window on the active screen.
List of type-hint changes which should be reverted: #26 (comment 15913)
Fixes: #26 (closed)