Thesauri updates need some extra validations

[daneryl]

There are cases that are not really clear how to solve on the translations side when updating thesauri values in specific ways, we think its better to add a specific validation for this cases and provide a semantic error to the user since this are or should be rare cases.

The scenarios to validate are:

1- Update 2 different values on a thesauri on different groups to the same value. 2- Update 2 values that are the same on different groups to be different values.

[RafaPolit]

Is this only a problem for the Translations of these elements? Or is this a problem for the actual Thesaurus values?

If this is only a problem because of resulting matching translation keys, I believe the approach should really be that: if a language Key has changed, we delete existing keys. If, on the other hand, a new X key matches a previous one, well, it uses the previous translations.

[Zasa-san]

Adding to this issue since I recently encountered a scenario that was really confusing:

On a thesaurus with this structure

- Item 1
- Item 2
- Group 1
   - Item 1
   - Item 2
- Item 3

where there are repeated items in the root and inside Group 1, the translations are the same for the repeated items. This means that when I want to translate this thesaurus I will find that I'm only able to translate Item 1 and Item 2 regardless of whether they are the root items or the grouped items.

I understand that Item 1 root and Item 1 inside Group 1 can be different things that might be translated differently. I'm not sure if forcing them to be translated in the same way is intended. @RafaPolit