editor: Fix edit_predictions_disabled_in not disabling predictions (#36469)

Closes #25744

Only setting changes and editor init determined whether to show
predictions, so glob patterns and toggles correctly disabled them. On
cursor changes we call `update_visible_edit_prediction`, but we weren’t
discarding predictions when the scope changed. This PR fixes that.

Release Notes:

- Fixed an issue where the `edit_predictions_disabled_in` setting was
ignored in some cases.

crates/editor/src/editor.rs

@@ -7764,6 +7764,14 @@ impl Editor {
         self.edit_prediction_settings =
             self.edit_prediction_settings_at_position(&buffer, cursor_buffer_position, cx);
 
+        match self.edit_prediction_settings {
+            EditPredictionSettings::Disabled => {
+                self.discard_edit_prediction(false, cx);
+                return None;
+            }
+            _ => {}
+        };
+
         self.edit_prediction_indent_conflict = multibuffer.is_line_whitespace_upto(cursor);
 
         if self.edit_prediction_indent_conflict {