fix: skip widgets with empty or infinite rects in remove_rotation

remove_rotation() calls widget.update() on every widget, but widgets
with empty or infinite rects (like invisible signature fields) cause
ValueError('bad rect') during validation.

Skip these widgets and also guard widget.update() with a try/except
for any remaining edge cases.

Fixes #4950

Author: thakoreh

src/__init__.py

@@ -11913,8 +11913,13 @@ def remove_rotation(self):
                 pass
         for widget in self.widgets():  # modify field rectangles
             r = widget.rect * rot
+            if r.is_empty or r.is_infinite:
+                continue
             widget.rect = r
-            widget.update()
+            try:
+                widget.update()
+            except ValueError:
+                pass
         return rot  # the inverse of the generated derotation matrix
 
     def cluster_drawings(