Fix of Hires Fix on Img2Img tab

[hipsterusername]

This fix addresses issues where Hi-Res Optimization is inadvertently left on in switching to Img2Img tab, resulting in txt2img generation prior to the Img2Img operation.

It does this by:

• Removing Hi Res Options from the Img2Img panel
• Setting HiresFix to false when Img2Img panel is loaded

It is non-ideal that this results in state being changed on the Txt2Img, however this is mostly a minor inconvenience, and the fix seems worth making without introducing additional complexity.