call state.jobnext() before postproces*()

[wkpark]

Description

• call state.jobnext() before postprocess*() to support job_count, job_no controls in postprocessing easily.

with this small fix, state.job_count and state.job_no could be easily controlled without hacky ways.

• without this fix, one can control job_count and job_no in postprocess*() by the following hacky way:
  • increase job_no in the postprocess*() - HACK
  • increase job_count in the postprocess* (slight jumping back progress bar)
  • decrease job_no before return. (possible live progress bar jumping back too much will occur) - HACK

Show case (with or without this fix. above hacky workaround applied)

• webui + a face detailer extension with progress support (postprocess extension, use postprocess_image() internally)

jum.back3.mp4

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