Add support for sending images by pasting from the clipboard

[Flaviongas]

I usually send screenshots in Whatsapp, but to send a screenshot i have to convert it to a file and then send it.

[d99kris]

Hi @Flaviongas - thanks for reporting a feature request. Given this is a bit of a corner-case and there are various complexities to handle (especially if handling pasting files in general), I'm not sure I will get to this any time soon. But I will leave the request here..