[Feature] Make room image hideable in sidebar

It is in my todo. The only reason why it isn’t done yet is because I simply didn’t know where to put the caret.

Should it be on top to the right?

collapse_image_caret

That could work for Room Info, but would currently collide with the Sleep-button for the image in Character Info (for your own controlled character).

Maybe I should move the sleep-button and align it to the left instead?

Suggestions are welcome!

Best regards,
Accipiter