Ability to open and edit individual letters in a Bulk Letters run using the built-in editor
After batch is loaded, offer a new option (Edit) in the individual selection within the batch detail
When edit is clicked the generated letter opens to the right side of the batch detail grid allowing editing of the filled in letter in the Froala html editor. Once editing is done the letter can be saved
When the batch is generated or sent out any edited letters will be used
Ability to edit a single letter from the Constituent/Gift tile before sending