Allow changing of values when requesting re-rendering of existing job

[hholzgra]

Right now it is possible to resubmit an existing rendering job, but none of its parameters can be changed.

Provide an alternative that pre-fills wizard form fields, but does not submit the new job right away, so that choices like style sheet or paper format can be changed.

Currently being worked on in "dev-reedit-2" (previously: "dev-reedit-form") branch -> https://github.com/hholzgra/maposmatic/tree/dev-reedit-2

• [x] create "reedit" view
• [x] add "reedit" buttons to map detail and list views
• [ ] restore:
  • [x] layout
  • [x] indexer
  • [x] style
  • [x] all overlays
  • [x] map title
  • [ ] language / locale
  • [ ] selected map bounds -- only seems to work sometimes?
  • [ ] city / osmid
  • [ ] upload files (gpx, umap)
  • [ ] paper size choice -- totally broken, does not even produce working form step yet
  • [ ] ... including "best fit"

[maltfield]

+1 for me because I'd like to be able to gently tweak the bounding box to adjust the scale in lieu of explicitly stating the output map's scale

• https://github.com/hholzgra/ocitysmap/issues/56

[maltfield]

Also would be helpful since the easiest way to change the bounding box in the WUI (not the API, which is straight-forward) is graphically. ie in lieu of:

• https://github.com/hholzgra/maposmatic/issues/68
• https://github.com/hholzgra/maposmatic/issues/96