Fix bad fontification of inactive widgets

* lisp/wid-edit.el (widget-specify-inactive): When a widget is
already inactive, still move the overlay to the desired
positions.  Improve docstring.  (Bug#69941)

* doc/misc/widget.texi (default): Document the need to call the
:deactivate function when modifying an inactive widget.

* test/lisp/wid-edit-tests.el
(widget-test-modification-of-inactive-widget): New test

1 files changed, 3 insertions, 0 deletions

diff --git a/doc/misc/widget.texi b/doc/misc/widget.texi
index 68d53a42025..f84e81bce77 100644
--- a/doc/misc/widget.texi
+++ b/doc/misc/widget.texi
@@ -1333,6 +1333,9 @@ modifications.
 Function that takes a widget and makes it inactive for user
 modifications.
 
+If you modify a widget that is not active, you should make sure the
+:deactivate function gets called again after the modifications.
+
 @vindex action@r{ keyword}
 @item :action
 Function that takes a widget and optionally an event, and handles a