Load footprints per collection (#1)

* put initial fetch in it's own file

* Select collection from results pane

* css clean up for FootprintResults

* Load More instead of Pagination

* load more features without rerendering all

* matched const, collection id bug and selection

* Sorting, load footprints when limit changes

* more fetch logic, removed Query Console URLs

* store collections in obj by ID

* switching planets/collections, load more logic

* fix for collection select id out of range

* include limit parameter in initial request

* load more features go to leaflet

* css and layout, layer wrap and color

* comments

* add footprints instead of replacing

* update query text but disable run from console

* clear filter on target change, no extra requests