I've tried the following shell extensions:
- pixel-saver
- Unite
- No Title bar
- Gnome Global Application Menu (HUD Gnome)
but none of them work on Ubuntu 19.04 and the title bar is really annoying. Are there any solutions that i could remove it or merge it with top bar?
I've looked through
- Wasted screen space due to multiple horizontal bars at the top when an application is open in GNOME desktop
- Ubuntu 17.10 windows' menu in panel
- Hide maximized title bar in Ubuntu 18.04
- On Ubuntu 18.04 can I hide the title bar AND still see the close/minimize/maximize icons?
and more with no luck.
There are two kinds of titlebars, the "classical" title bar provided as a Windows decoration and, for GTK3 applications only, the new "Client side decorations" (CSD), where the title bar is provided by the application itself, and as such can contain other functional elements such as buttons etc.
All solutions you tried remove the "classical" title bar. They will work on 19.04 provided you run xorg, and may not necessarily work on Wayland. So first check whether you are running xorg or wayland. If you are running Wayland, you can switch to xorg by logging out, then before logging back in, you can select a session on xorg after clicking the cog wheel.
If your application uses a CSD titlebar, then it cannot be removed.