mrtg treeview

Remove the 'host' tree branch and rename the 'test' tree branch to a temp name

Make new tree the default

Change config tree to use a tree. Change path separator to a slash

Yank new code above old page logic, sort by sequence, simplify shown tree, remove some debug

First fully functional full tree system

Remove basic frames

Make frameless trees the default

Update styling and make frameless tree more usable

Initial implentation of frameless menus

Fix up targets