New options for automatic term proposal deletion on TBX imports

We need the deletion of terms and deletion of proposals during the TBX import to be independent from each other. In the future it should like the following:

• Delete all terms in the TermCollection, that are older than date X
  OR
• Delete all terms in the TermCollection, that are older than the current import
  AND optionally
• Delete all term proposals in the TermCollection, that are older than date X
  OR
• Delete all term proposals in the TermCollection, that are older than the current import

The GUI must reflect, that of the 2 "OR" combinations only one of the options can be selected at the same time. So if one of the is selected, the other must be emptied and deactivated.

The feature leads to the conclusion that the following must be possible:

• If there is an existing term with a proposal for changing it
• and the term is deleted, because it is not present in the current import tbx
• but the term proposal should not be deleted
• than the existing proposal must be changed so that it no longer is a proposal to an existing term, but a proposal for a complete new term (or even termEntry)
  • In this case all existing attributes of the change proposal should be taken over to the new term in status unprocessed, but all other attributes, that already existed in the deleted term should be new attributes of the proposal