Fix parsing URLs with no parameters.  Add isEmpty and remove methods.
Add UrlParams unit tests
Fix parsing edge cases and added edge case tests
Fix _store initialization in public method parse()
addIndicator now adds to DOM, add special case for CodeInspection module
Small code cleanup
Merge pull request #6246 from lkcampbell/fix-6008

Fix UrlParams parsing when URL has no parameters.  Add remove() and isEmpty() methods.
Make sure _beforeID element exists before inserting indicator before it
Add public parameter insertBefore to StatusBar.addIndicator()
Update 'busy' indicator comments
Merge pull request #6304 from lkcampbell/fix-5682

Fixed status bar so it can add indicators to itself again