Table fields order

[leolami]

Checklist

• [x] I've searched through the current issues to make sure this feature hasn't been requested already.

Motivation

Defining the order of fields in the table is very useful

Suggested solution

Manage the order of fields based on the related settings deriving from the QGIS project

The order must be show also in the editing mode

Alternatives considered

No response

[Raruto]

same as: https://github.com/g3w-suite/g3w-admin/issues/682