This shouldn't break any uses of moonlib/image. (Using the default image is actually an error in moonlib/image)

make accessors for cached image data in GUI (to be used by draw image, ggee/image, and moonlib/image)
revise drawimage code to use the accessors

more whitespace cleanup, comment and improve image_get_filename code so it doesn't look like a crasher bug

custom comment width not respected when editing
update css property word-wrap to overflow-wrap

vsl freezes after updating maximum-range in the dialog

add prefs dialog styles for each preset (this is copy/pasta which probably should be refactored at some point)