Issue #22670:fix deleting of quote when all lines deleted
Issue #22670:fix merge conflict
Issue #22211:allow null in _prjtype combo
Merge pull request #277 from garyhgohoos/22670

Issue #22670:fix deleting of quote when all lines deleted
Merge pull request #282 from garyhgohoos/22211-2

Issue #22211:allow null in _prjtype combo