Fixes #866
#877 - Reverse subtitle delay shortcuts to behave like VLC
Redo  #866 fix. Bit cleaner
Re-add checkEmpty
Fixes #500 - Don't highlight/toggle "Subtitles Off" when clicking subtitle icon
add native buttons for windows

closes #972

-thanks @MrVaykadji for the icons
Fix flex bug on Tv and Movies lists

commited out outdated code.
setup native os buttons for windows
Work on Drag & Drop styling
redo app.js indentation
remove obsolete theme components (wip)

-remove popup styl
-begin work on cleaning up details
en lang addition.
Merge #923
fix conflicts