Fix AppleRemote thread not being killed when exiting the application

I’ve been seeing the error about the AppleRemote thread still running when quitting for years… had enough

(cherry picked from commit 42dd0a3470b401a59c36d22e9b0982a17db26a77)
Make python bindings work on mac

We play with the environment variable PYTHONPATH at run time so it points to the current location where the application bundle is located.
It assumes —with-python=python2.6 has been provided to configure (which the mac perl packager will do from now on)

(cherry picked from commit 66e6b5b7906eca45ae481df3c5911a6283eb225b)
Fix MythVideo general settings page not working

How long that one has been broken ???

The new MythUI screen is always on top, so it must be hidden when starting on old Qt screen…
Hopefully there are no more like this

(cherry picked from commit d7de3ff15162c6ce08ede065b5902bda31d1435f)