Handling $viewContentLoaded event now allows the collapser to be invoked, depending on the isFirstViewing member variable.

Added overview to SystemSelector.jade
Experiments with cleaning up height calculations for displayig in collapsed and expanded map view modes.

Problem with ArcGIS scalebar in the map_canvas, rather tha the actual map display div.
Some attempts to fix ScaleBar.

Still no solution, but leaving in some code that doesn't cause problems or is commented.
Changed current map position field to text input.

Fixed problem with resize losing footer after mouse move started generating position events, which caused the current position text display to enlarge to multiple rows when the window size is small.