[net-libs/libmm-qt] Ebuild cleanups

* kde is not required
* missing deps
* sync release keywords with live

Package-Manager: portage-2.2.7
[net-libs/libnm-qt] Ebuild cleanup

* kde is not required
* add missing deps
* sync release keywords with live
* make modemmanager support in live optional

Package-Manager: portage-2.2.7