Fix neverEndingReddit.js rank-width-updating.

It used to compare the first and last ranks
in the new page; this doesn't work for when
you skip pages, i.e. with the "return to
previous page" feature.
Merge pull request #1636 from calvinli/master

Fix neverEndingReddit.js rank-width-updating
subredditManager: Allow shift-click to work properly

Fixes #1637.
Merge pull request #1638 from mc10/shift-click

subredditManager: Allow shift-click to work properly