Merge pull request #305 from hurzl/master

more DE fixes
Add an entry in the cover popup menu to reset image data for the current album (reset black list ...)
Merge german translations
Merge pull request #303 from jcnoir/master

Add an entry in the cover popup menu to reset image data for the current...
Switch fragment visibility for the phone layout.
Merge pull request #306 from jcnoir/master

Switch fragment visibility for the phone layout.
Temporary fix for the goto playlist item from cover works on phones and tablets
Merge pull request #307 from jcnoir/master

Temporary fix for the goto playlist item from cover works on phones and ...