Integrate "Open With" menu to ksnip to quickly open the current image in an external editor

[Alexey Murz Korepov]

Is your feature request related to a problem? Please describe.
Pretty often I start editing a screenshot using ksnip, but then want to switch to an external editor (eg Krita) to get more powerful instruments, and then - copy back to the clipboard (even without saving the file).

But now I should save the image to some directory, then open the directory and locate the file, right-click on it, and only there - get the "Open With" menu with "Krita" option.

Describe the solution you'd like
To simplify this flow, will be good to integrate the "Open With" menu directly into the ksnip menu, which will save the file to a temporary location (if it wasn't saved already to a permanent location) and open it with the chosen tool.