Bug Description

MATE themes like Ambiant-MATE and Green-Submarine are great but they don't work on XFCE (at least on 16.04 LTS) as they don't have the xfwm4 configuration folder without which the window title bars and minimized window status backgrounds cannot be themed on XFCE.

For proper interoperability of these themes on XFCE, I hereby appeal to Ubuntu-MATE team to add the xfwm4 configuration to their themes. As a precedent, such a configuration already exists in one of their themes called "menta", so it should be possible to do the same for other popular themes such as Ambiant-MATE, Radiant-MATE, Blue-Submarine, Green-Submarine, Black-MATE, Blue-Menta, etc.