Add user-friendly popup alert to replace toast messages.
Fix bookmark shortcut not defaulting to the bookmark tab.
Fix hide-read posts breaking due to recent HTML restructuring.
Fix thread menu to reflect ABC changes (use app instead of android in menu xml). Lower default alert display time.
Merge pull request #221 from Geekner/master

Add improved alert/error popup. Fix hide-read-posts. Fix thread actions dropdown+sharing.