SelectEditor stops editing before flushing its value when flushOnCommit is true

[saba-mo]

The default behavior of SelectEditor when GridModel.fullRowEditing and Select.enableMulti are false is to stop editing on commit so that the user does not have to take additional action to blur the input. However, the new value is not getting picked up by the event passed to agOptions.onCellValueChanged, resulting in the event's newValue remaining the same as its oldValue. This was seen while testing a client app and seeing the newly selected value from the select editor revert to the original value.