Automatically remap line items in import actions

As a model builder, i would need that in the following conditions :

- an import mapping uses manual mappings for line items

- the source line item name(s) are changed in the source module,

that the manual mapping would be updated automatically

or alternatively that we get a blocking mechanism that alerts us upon trying to change the line item name that the import definition is using the corresponding line item and thus would need to be updated.

This is asked because we ran into multiple times regressions that we discovered were due to the fact that some model builder changed line items names in sources, line items being used in manual mapping imports definitions, thus "breaking" the import mechanism