Add more internal commands for opening prefs. Fixes #1448
open pref panes on the main thread
update references to hi-res images
set scaling to "Up or Down" for images in the Setup Assistant
Merge pull request #1518 from skurfer/tiff

update references to hi-res images
Merge pull request #1449 from pjrobertson/internalCommands

Add more internal commands for opening prefs. Fixes #1448