Summary:
Indent is made bigger so the horizontal lines have more space and the whole thing can breath more. To componesate the view scroll horiztontally so that the tree node is always visible. Was also able to clean up the hierachy a bit
changelog: increase tree indent and automatically scroll both horizontally and vertically when selecting an element
Reviewed By: lblasa
Differential Revision: D43311566
fbshipit-source-id: 53bc7bd55027e87fdecadac9aa8bc41612bb684a
1cd916e414