* Remove `mesa` as dependency; `qt5-base` and `qt6-base` both depend on it
and none of the projects depend on it directly; official Qt-based
packages like `qtcreator` also don't depend on `mesa`
* Add `libx11` as dependency of `qtutilities` and variants as it is
actually used directly by those packages for the capslock detection (even
though that feature was broken for quite some time)