Add filter button icon and hide toolbar button text on small displays

Bootstrap considers 1200px or more to be a large display. It just so
happens that our toolbar's layout gets out of whack right around that
dimension so the new CSS in the media selector deems a large display to
be 1200px and hides the button text in the navbar buttons when the
screen width is smaller than that.
Add tooltips to the toolbar buttons(including paginator buttons)
Use offset of results workflow to calculate right of context panel
Merge pull request #245 from cbmi/issue-241

Add support for smaller displays and fix right offset calculation for context panel