Interrogate from anywhere.

[Symbiomatrix]

As far as I can tell (and I haven't investigated thoroughly nor tested yet), clip interrogate only works on img2img tab's input because its button belongs to the top row (create_top_row -> img2img_interrogate with inputs=[init_img]).

This seems odd, since if the button were simply created per tab (through generation_parameters_copypaste), or linked to the gallery (result_gallery), it would have a more diverse function.
Also, adding a simple null check to the ui.interrogate method should prevent an interface error in all cases.

Is there some design consideration I'm unaware of here, or an oversight in the process? Anyone attempted this before?