Conformance rules input columns and Mapping table default values bad path to nested arrays

## Describe the bug
Conformance rules and Mapping table default values save nested arrays in a bad way. A nested array is represented as `column1..column2`. This happens for conformance rules when columns are selected or for mapping table default values

## To Reproduce
Steps to reproduce the behaviour OR commands run:
1. Go to a random Mapping table that has a schema with nested arrays
2. Select a default value for an element inside nested arrays
3. Look at the path in Menas of that selected value

## Expected behaviour
Nested arrays should not have double dots in column paths