Change order of min/max/value assignment in slider/text control to avoid errors
Increase size of UI elements on colorize form
Convert color temperature tool to new slider/text custom control
Retool and optimize color balance tool

Better results now; maximum strength results in a fully colorized image,
while look-up tables are now used for improved speed.
Convert bright/contrast tool to new slider/text custom control
Convert trace contour tool to new slider/text custom control