Adds the Florence2 Hi-Res Fix option to the upscale mode dropdown and a
sub-panel that renders when selected: 4 detection fields, 4 crop/resize fields,
5 mask-shape fields (grow_expand + 4 feather sides), model/lora source dropdown,
and the no-detection dropdown. Hires sampling fields (denoise/steps/cfg/sampler
/scheduler) are reused from the existing hires_only mode rendering — Florence2
sets showHires=true so they appear naturally. Combos counter treats Florence2
as 1-output-per-input (no cartesian multiplier).