Struct field complete suggestion should follow declaration order instead of alphabetical

[Paladynee]

This is one of the subtle things that I've always hated: I expected the suggestions to follow the declaration order, but it has been alphabetical instead. It causes all kinds of headaches when later I'm changing the fields and can't find the field easily in the new method, because I filled the fields with the suggestion order instead of declaration order and now it's all messed up.

Notice how the declaration goes "source, start, index, line" and the suggestion goes "index, line, source, start".