Fixed up the tab/spaces. Removed the currentlyVisibleTSVsForTimeSlide
and instead use the allowTimeSlider property of the tsv to find those
that use the time slider functionality.
Merge pull request #341 from mbucknell/NAWQAAN-398

Nawqaan 398
Merge branch 'master' of github.com:USGS-CIDA/nar_ui into NAWQAAN-416