Fix capitalization of the word "raw"

[Bicyclops]

The word "raw" is an ordinary noun/adjective, as in "a raw carrot", "a raw image", and as such it should be capitalized "raw", not "RAW" as it is not an acronym nor an abbreviation.

When used in sentence case: "Open raw photo"
When used in title case: "Open Raw Photo"

Places I noticed where it's incorrectly capitalized:
1. "Edit > Import RAW File(s)..."
2. The window which pops up when you click "Edit > Import RAW File(s)..." has incorrect capitalization in the title. Since it's a title it should use title case, so it should be "Import Raw Files".

[tmodes (tmodes)]

Fixed in repository.