[controller] UndoController: fix output method (closes: #1776091)
Fix buggy direct output in `UndoController.publish()`.
Raise now a ValidationError instead of malformed string
Changes:
* raise ValidationError when an error occured in undo
* use the new message mechanism based on _cwmsgid
If errors are not fatal, you have to change publish() method.
CSS Coding Standards
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(Draft, to be continued)
:Naming: camelCase
Indentation rules
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- 2 espaces avant les propriétés
- pas d'espace avant les ":", un espace après
- 1 seul espace entre les différentes valeurs pour une même propriété
Documentation
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Please keep rules semantically linked grouped together, with a comment about
what they are for.
Recommendation
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- Try to use existing classes rather than introduce new ones
- Keep things as simple as possible while in the framework
- Think about later customization by application
- Avoid introducing a new CSS file for a few lines of CSS, at least while the
framework doesn't include packing functionalities