added lots of new image manipulation features in Media, now basically testing them all out on all platforms and will publish soon.
The problems with twitter is that it does not have an SDK, thus it uses only REST API, meaning, there could be a crossplatform twitter lib in plain lua, in that case provided uploading example will fit the best.
I have no idea about VK, if they have a SDK or REST API?
The dialog on IOS is great, but it is IOS only. Support such platform specific would only fragment the code api, thus I think such additions could be left to plugins. But honestly if it is not a crossplatform solution, I would rather not waste a time on such plugin