Better meta description
Minor code formatting and comments
Hide the 3-panel view refresh button when adding or removing subreddits/channels

The button was in the way of the add and remove buttons - it wasn't
possible to click them. This refresh button is not used during this
subs/channels editions, so now it hides while editing.
Fixed misbehaviour when chaging the sorting option while adding/removing subs or channels.

On iPhone, when the user is in the editing subs/channels views and it
changes the sorting option, the horizontal container breaks, and its
overflow "becomes visible", disrupting the whole experience. So I
decided to block whole sorting chaging while editing, to avoid the
weird behavior altogether (line 1056).
Bumped the appcache