change some tohkbd settings to configure mce instead of doing random things from daemon

[kimmoli]

In near future mce will provide setting for e.g. keyboard removal actions. This is now done "manually" over dbus inside tohkbd-daemon, but could just change mce setting.

ref https://bugs.merproject.org/show_bug.cgi?id=1321
ref nemomobile/mce#327
ref nemomobile/mce#328

Requires mce version > TBD

[kimmoli]