On load don't focus on editor pane

Want to retain focus on file manager incase we are using shortcuts to
open files etc
Shortcuts added to allow working with FM

Up/down = traverse up/down in current dir
Left = back up to parent dir
Right = open dir/select 1st item in dir/open file
Enter = expand/refresh dir or open file
Background transition, changes on focus/blur

To indicate which side has focus
On load, focus on files after a 0ms tickover
fmAction added & code tweaked, alts & improvements

On init, select root dir
fmAction added to allow movement around file manager with
up,down,left,right and enter
load param in openCloseDir is now always the opposite of what it was
before. Function also removes node if it was UL, so we don't have hidden
elems still there
Refactored tag wrapper section
Added conditions to move between file and content areas
(CTRL+Alt+left/right)
Space is no longer the key to refocuson content area