Comment 2 for bug 1717366

I've abstracted out the functionality in toggle_expand_summary() into a controller function. This is called when the summary expand button is pressed as well when there is a change in the "toggle off patron summary" library setting.

The branch can be found at:
http://git.evergreen-ils.org/?p=working/Evergreen.git;a=commit;h=3131f7151ddaab6e0a4e43fc196bb1903868d989