Use visible proc when available to hide PIP when PIG is displayed

This so smoother in case the PIP should be displayed
Rename some keys to make the code a bit better readable
added option for delete movie and return to playlist in movieplayer

Signed-off-by: littlesat <littlesat99@yahoo.com>
servicemp3: seek on keyframes.

We are not using keyframe seeking, and it looks like it's problem
for some receivers. I found mp4 which has exactly same problems like
this. After enabling keyframe seeking there is no freezing anymore.

Signed-off-by: Erik Slagter <erik@openpli.org>
optionaly stop previous broadcasted service on return to movielist in movieplayer

Signed-off-by: littlesat <littlesat99@yahoo.com>
Move the eTimer out of the PictureInPicture Screen class

As it might have wierd results when deleting this class
Ensure that PIP proc is made visible even when PIP does not exists

This resulted in not apearing PIP when you did a service scan before.
ScanSetup: simplify some code to stop the PIP before scan

The same can be performed on more places where this is done
Standby: Simplify some code to stop PIP when going in standby
Simplify stop PiP in some plugins
Add option that can configure CH+/-, B+/-, P+/- buttons for zapping
InfoBarGenerics: Only remember lastPiPService for a minute
Merge branch 'master' of git://git.code.sf.net/p/openpli/enigma2 into BETA

Conflicts resolved:
	data/keymap.xml
	lib/python/Components/SystemInfo.py
	lib/python/Screens/InfoBarGenerics.py