Closes #3519 Usages weren't consistent; since `é` isn't accessible on usual english keyboards, just use regular `e` instead of alt-223 entry. Not sure why VS preferred to save the text files without an encoding prefix; oh well.
Extract color util to separate class as it's not entirely image related.
Closes #3315
Allows trimmed dll usage by keeping pkm sprites in one project, and all other cosmetic UI stuff in another project
