Several PiPZap improvements

-fix zap to alternative pip service
-add check the available tuner for pip service
-add check parental control for alternative pip service
-correct  zapUp/zapDown for pip service
-correct  grey services if pipzap enabled

Thanks Dima73
added option to adjust the existing timer with green as exist remove timer

Signed-off-by: Littlesat <littlesat99@yahoo.com>
Since latest commit remove timer should be change timer
Some additional small changes to Change timer behavior

Green, Green = Edit timer
Green, Red = Remove timer (without extra confirmation)
Add timer desciption to timer change choicebox

Thanks IMS for the suggestion
Solve timer picons for renamed services
Fix previous commit as service is alread a string
Correct reference for renamed services with add/change timers

Thanks Dima73
RecordTimer: Add sanity check

Thanks IMS
servicemp3: fix regression from 29c3389dfadd68f...

This commit caused gstreamer to not return shoutcast stream
metadata to the application (shoutcast, NETcaster etc).

Signed-off-by: Erik Slagter <erik@openpli.org>
Merge branch 'master' of git://git.code.sf.net/p/openpli/enigma2