OE2.5 Merlin4 For DM 900 Ultra HD-25.02.2018

Merlin OE-2.5 revision 783:
PiconResolver:
- check if getname returns None...that fixes the crash reported at Nuke Evo skin Sendersuchlauf funktionier nicht
Skin:
- new option: set skin_user.xml for specific skins --> "Dirnname_of_Skin.skin_user.xml"
- e.g.: /usr/share/enigma2/Nuke.Evo --> Nuke.Evo.skin_user.xml or /usr/share/enigma2/Vali.HD.warp --> Vali.HD.warp.skin_user.xml
PiconLoader:
- add new filter criteria creator
- add options n/a or all where it makes sense
MultiEPG:
- speed up multi epg (do not check for every single multi epg entry the picon search path, it's good enough to do this only one time)
- show result of menu-actions immediately
BoxInfo:
- add possibly available cpu-thermal to sensor-class
- beautify getTempSensor-method of BoxInfo (remove unnecessary check for dm7020hd, remove unnecessary try/catch construct)
Translation:
- update french translations
- update polish translations (thanks to kosmacz)