Center light box when editing. Its hard to find on the screen.
Center light box when editing. Its hard to find on the screen.

This commit sticks the action menu to the top of the screen if we scroll down the page too much.

The fix we discussed for this was having the iframe scroll instead of automatically resizing to the size of the page.

[#112067555]
https://www.pivotaltracker.com/story/show/112067555

concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse