working indicator

Where is the indicator used?:
- on batch update.
- on every attempt to fetch a collection. To see it you would need to set bootstrapped data to false in /public/app/browseWorks.js : 146;
- while saving an edited work
All these changes seem like the wrong solution to getting the working indicator running.  All these classes should be "float left" in the original file for a reason (though I don't get enough of the box model to point out why).  This does change the behaviour of the webpages.  Compare master to this branch: in my Firefox window of 920 pixels internal width in master there is a two-column grid of works, but with these changes in this branch it becomes a single column, until the window is made quite wider when it suddenly snaps to three-column.

If the chosen solution for the progress display requires these changes, the solution should really change.  Attach to the body element instead of the view element, since the overlay anyway fills the entire screen?  Or just switch to an animated gif that can be put next to the action buttons?  Since the forms are disabled, the overlay is not strictly necessary.