git: openjdk/jdk13u-dev: 8244088: [Regression] Switch of Gnome theme ends up in deadlocked UI

[Yuri Nesterenko]

Changeset: 9ed07b90
Author:    Yuri Nesterenko <yan at openjdk.org>
Date:      2021-05-05 07:29:44 +0000
URL:       https://git.openjdk.java.net/jdk13u-dev/commit/9ed07b9029c3174462ed778dba552d119febd1d9

8244088: [Regression] Switch of Gnome theme ends up in deadlocked UI

Backport-of: a7f46919ff43ede12ed977512a3b0d93bc4cbc76

! src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.c
! src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.h
! src/java.desktop/unix/native/libawt_xawt/awt/swing_GTKEngine.c