[GTK3] Replace deprecated GdkScreen monitor functions with GdkDisplay ones [EBZ#539392] --------------------------------------------------------------------------------------- Key: ERT-671 URL: https://issues.jboss.org/browse/ERT-671 Project: Eclipse Release Train Issue Type: Task Components: Platform Reporter: Friendly Jira Robot Assignee: Eric Williams Labels: SWT, bzira This function is currently dynamic, but still runs on GTK3.22. It should be guarded and used only on GTK3.20-.