Fix send image and dimensions to not be a footgun

[realwumbl3]

Description

• Prevent copying image size over that are over the limit of 2048 when using "send image and generation parameters" buttons
• simply added min(img.size, 2048)
• it would set the image size to way beyond 2048 and cause a crash when generating :)

Screenshots/videos:

Checklist:

• [ ✔️] I have read contributing wiki page
• [✔️ ] I have performed a self-review of my own code
• [ ✔️] My code follows the style guidelines
• [✔️ ] My code passes tests

[lllyasviel]

hi we are going to close PRs before forge's recent major revision
if we missed some important PRs, please consider reopen (if that is not already on our todo list