Repeating groups: Validation trigger for single row

[olemartinorg]

Description

Currently, adding "triggers": ["validation"] on a repeating group element will trigger validation for all rows inside the group when attempting to save/close one row. This is not what one might intuitively expect.

Suggestions

1. Either make the validation trigger for repeating groups trigger validation for the row (a breaking change) and optionally introduce a new validateRows or validateAllRows specifically for groups, where all rows are validated (as they were before), if this is functionality we need.
2. Or introduce a new validateRow trigger for repeating groups, which only validates the current row, leaving the validation trigger as it is now.

Example

The current solution leads to lots of noise in the UI when saving a row in a repeating group you haven't started filling out yet. This example is taken from an app that creates semi-filled rows the user have to expand to fill, but saving one of them validates all of them:

[Magnusrm]

Implementing this feature might solve the bug:
Input felt med skjul vis regel i repeterende gruppe valideres ikke som det skal #296