Bunch of fixes and improvements over the base_geoengine migration to 17.0

[sersanchus]

After having been reviewing your code proposal for base_geoengine, here are some commits to correct certain things that I have detected:

• Fix in the component override in domain field
• Field 'type' is used instead of 'mode' in model_view_id domain in vector layer view
• Removes 'simplejson' as a python dependency
• Completes the layers panel reordering by drag and drop
• Fix in the access to props state that can be undefined in controller modelParams
• Recovers the gist index creation for geometry columns when is required
• Adds correction on the configuration and use of projections in widget geometry
• Fixes the use of extractProps in geometry fields

[sersanchus]

Hi @peluko00 and @miquelalzanillas, could you consider incorporating this branch into your base_geoengine migration?

[miquelalzanillas]

Merged. Thanks!