Add fadeSpeed option to showParent

Just a copy/paste job
Night mode - search box

!important override for reddit inline style on the search box on the
search page.
Add opacity to subreddit style label/checkbox
Add soundcloud to toolbarFix domains
Add missing fadeDelay property in subredditInfo

Prop was missing, so user changes were ignored for the default value.
Settings console typo tweak
Add github/wiki links to About
Merge pull request #557 from gavin19/master

The Magnificent Seven - Lost Commits Edition