**Describe the bug** In Cinnamon, even when one choose to display buttons at the left of the windows, they stay at the right of ClamTK window. **Screenshots** See https://github.com/linuxmint/cinnamon/issues/10313 **OS:** * Cinnamon version : 5.0.7 * Mint 20.2 **clamtk:** * ClamTk 6.0.2