Clean up designer auto generate code. Use more consistent names, arra…

…nge widget functions in groups and order according to layout. (Sorry about the bad diff in the design generated code sections due to the reordering and renaming.)

Simplify option form updates with common redrawOptions.
Add defaultOption as a common point for resetting to default options.
Add -paltype command line for full palette format selection.
Add path resolution to parseOption (will be needed for INI files).
Rename palette_greymask to palette_greymax (describes its use better).
Store palette_path to allow saving the last used palette to INI later.
Consolidate refreshPalette into redrawPalette (which is better named and was only called by refreshPalette anyway).