Fallback to SD picon when HD picon does not exist

As discussed here: http://forums.openpli.org/topic/35628-picons-by-service-name/page-4
Add extra check in case the servicename was only hd...

In addition to the previous patch... it might happen....
ebase.cpp: Cosmetic, add a newline in constructor
Merge branch 'master' of git://git.code.sf.net/p/openpli/enigma2