Can you give an option to toggle "show system title bars and borders" like chrome? When you can click on the chrome tab bar, it gives this option. When the option is selected it displays the system title bar. This title bar gives you a lot of additional options for the window. On KDE that translates into

Special window settings
Choosing which activity this window should belong to etc.

I mainly want this option for proper activity support in Steam and segregating my multimedia/gaming activity from my development activity