Adding a "validation" trigger on a group component ignores "component"-specific validaitons

[lorang92]

Describe the bug

Setting the validate flag in triggers on a group will run data model/required validations but seems to ignore component-specific (defined in formlayout) validations.

To Reproduce

Steps to reproduce the behavior:

1. Add a group with a date picker component
2. Add a max date for the component
3. Use the keyboard to fill out a date later than max
4. Save the group
5. See that group saves

Expected behavior

User should be prevented from saving when saving and validateFormComponentsForLayout should validate correctly.

[lvbachmann]

Must be bumped to B severity if back-end validations doesn't solve the issue.

[bjosttveit]

Not relevant anymore, focusing on #600 instead.