Validation of dynamic items in settings

[iLLiCiTiT]

Issue

• dynamic items does not have validated schemas (children of list or dict-modifiable items)

Changes

• on schema validation of items with dynamic children is created one temporary item and schema is validated on it (item is removed afterwards)
• fixed invalid schema data

How to replicate bug

This may cause multiple issues one of them is duplicated key in dict item under dict-modifiable.

1. go to system settings schemas and open schema_tools.json
2. duplicate "environment" child under tool_groups key
3. open Settings UI

• you will see invalid value (red color) but you should see warning dialog which says that schema was validated