Deprecate ThumbCreatorV2 and improve ThumbCreator apidox
Review Request #117313 - Created April 1, 2014 and submitted
Improve ThumbCreator apidox Also add a couple of KF6 TODOs Deprecate ThumbCreatorV2 This only existed to add virtual methods to ThumbCreator while keeping binary compatibility. These methods have now been moved into ThumbCreator.
Builds and installs, as does kde-runtime (where there is code that implements and makes use of these interfaces). Apidox builds and looks fine.