Show the red cross when one of the constraint is enforced

[qgib]

Author Name: Harrissou Santanna (@DelazJ) Original Redmine Issue: 18468 Affected QGIS version: 3.1(master) Redmine category:forms

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Not respecting the constraint on a field shows:

• either a yellow cross (changes can still be applied) because unenforced constraint
• or a red cross (changes are forbidden - OK button disabled) because enforced constraint (even though #26343).

When more than one constraints are applied on a field, with one being enforced, if the enforced one is not respected, then QGIS disables the OK button but displays the yellow cross. It should instead show the red one (more coherent with the issue).

[Pedro-Murteira]

Still valid on QGIS 3.22.4 and 3.24.0.

[gioman]

+1million!

The difference between a field where the constraint is enforced and where is not is very... little!

let's use a light shade of red and a red cross for enforced constraints!