Removes some unnecessary head stuff
Gets rid of a few possibly unnecessary tags, break to check a thing

Hiding elements in the tree is behaving strangely, going to go back
to gh-pages branch to check if behavior is in there too
Gets rid of .sidebar-body
Moves indication of height dragging for .scene-tree
ol to ul
Fixes jump to top not referencing an existing id
The .sidebar-section into section tags, more semantically relevant
Fixes hitch with animation for collapsing scene tree elements