fix a bug in plan_a_trip form submission that forgot to call LMmap in CsMaps.tripMap.getCenter()
use bootstrap media query variables to replace hard-coded media query breakpoints
[#72442350] put Plan button in same line as breadcrumbs (all trip planning pages); move Legend container to left hand above filter container, only show in large screens, have button to show/hide legend container in phone & portrait-tablet;