refactoring readerrolling
and fix lossing progress when switching screen mode
reset ticks cache
return to previous filemanager view instead of opening a new one
Merge pull request #980 from chrox/collapsible_toc

refactoring readerrolling
count only leaf nodes of toc tree when level is zero
Merge pull request #984 from chrox/collapsible_toc

count only leaf nodes of toc tree when level is zero