1.
sudo apt-get install gtk3-nocsd libgtk-3-dev libgirepository1.0-dev
2.
sudo gedit /etc/X11/Xsession.d/01gtk3-nocsd
3. Promjenite:
#export GTK_CSD=0
sa
#export GTK_CSD=1
4. GTK3 Classic:
sudo add-apt-repository ppa:lah7/gtk3-classic
5.
sudo apt dist-upgrade
6. Reboot.