SPOT-551: partial implementation (space-details now puts focus on x on open and esc keypress closes the space-details div)
SPOT-551: now when spot details are closed via escape key, the button for that spot is given focus
SPOT-551: moved the closeSpaceDetails function to load earlier.  Clicking the X now uses this method
SPOT-551: space detail popin now has the flow of focus correct when tabbing