Changes since 5.1d3:
Feeds view: fixed bug where unread counts might be misplaced at startup
Timeline: fixed extra row of pixels in swipe actions
Article view: tweaked some colors
Toolbar: reader view button is now not blurry on non-retina machines
Toolbar: review view animation looping fixed
Inspector: fixed some layout/spacing issues
Preferences: tweaked text relating to holding down the shift key
Dock unread count: now asks for permission so it can show it