Makes the settings dropdown menu more stable

Currently the settings dropdown menu doesn't always disappear on its own
and often is doesn't stay open even when you're cursor is on top of it.
This change straightens out all of the its kinks.
Firefox fix

white-space property was causing a firefox-only issue. Don't need it
anyway.
Undid something that affected user switcher
Extra cleanup
Merge pull request #1338 from githue/cogHover2

Fixes for the cog/gear settings dropdown menu