1.20.4 (stable):

* Details: Really make non-editable multiline text fields non-editable.
  (Murray Cumming)
* Edit menu: Make the Cut/Copy/Paste menus actually work.
  (David King, Murray Cumming) Bug #518315 (Göran)
* Choices: Make sure related choices are sorted (by ID).
  The sort order can be specified in Glom 1.21/22.
* libglom: Document_XML: Remove an unimplemented method.
  Bug #666744 (yselkowitz)