- add gtk3 flavour - rework detection of incompatible flavours, less copy-and-pasting when making changes - remove the "huge" flavour, it wasn't linked to the build anyway, and the option set by this was already used by default upstream
- add gtk3 flavour - rework detection of incompatible flavours, less copy-and-pasting when making changes - remove the "huge" flavour, it wasn't linked to the build anyway, and the option set by this was already used by default upstream