Moved collapsed bar to be statically positioned at bottom of page and open upwards. Margin equal to the bar height is added to the page to prevent content from being obscured. This includes UI fixes and updates related to repositioning.

  Initial version of smallbar keeps actions fixed on the bottom of the page and expands content above this. Does not currently support closing or collapsing; UI tweaks needed.

  * clicking on tabs now actually shows contents in content pane
  * scroll property on content pane switched from scroll to auto to get rid of (unncessary) unsightly bars
  * added close button in content pane
  * swapped arrows above current tab to be at top of bar
  * effectively added margin to page so that bottom bar doesn't obscure any content
Merge branch 'smallbar' of github.com:GSA-OCSIT/mygov-bar into smallbar
miscellaneous UI/UX improvements