Pullback/separate_seriesview

Made a Setting out of Series mode, because logical it has nothing to do with "View Read" ...  and they could be combined!
Tested this (fast) on my nexus 4, seems like it works (I had fear I mad errors when cherry-picking and then hand merging it (needed to place all my constants and stuff)
Still you should review it :)

Hope this makes it easier for you to merge.