rename: ClassTreeBuilder -> UiBuilder
play with TextArea
add HexPane
add ClassHex
convert class bytes to hex string
convert class bytes to ascii string
test HexPane
play with tree selection
play with tree selection
play with list selection
play with tree selection
backup ClassHex
redesign ClassHex
ClassHex
code clean up
high-light hex when tree node selected
select hex
bug fix
disable HexPane editing
move UiBuilder to gui folder