Removing support for <outliner> tags
Removing <tree> layout code and moving <tree> tags to outliner layout
Convert all usage of <outliner> to tree tags
Convert all usage of <tree> tags to new <tree> syntax or <listbox>
r=cmanske,varga sr=hyatt,sspitzer a=asa
Also includes fixes by Jan Varga (varga@utcruk.sk) for bugs 132020, 133451, 131393, 115894, and 129327
80548 - outliner scroll bar "disappears" in 3 stages
111101 - No scrollbox / slider / thumb in thread pane scrollbar
116269 - white scrollbars briefly show up in folder pane
116432 - Sometimes the twisty won't update after a click
116855 - Modify outliner builder syntax to match outliner content model
r=waterson, sspitzer, blake
sr=hyatt
99715 - convert category tree to use outliner
r=hixie
sr=blake
<textfield/> -> <textbox/>
<title/> -> <label/>
value -> label for all widgets except textbox, progressmeter, and text.
progresstext -> label
data -> value
r=blake, hewitt. sr=ben, hyatt. checking in for maolson@earthlink.net and blakeross@telocity.com.