Create ImageBox thumbnail when initializing self.image

src/gourmet/reccard.py

@@ -1472,6 +1472,7 @@ def __init__(self, rec_card):
         self.addW = self.ui.get_object('addImage')
         self.delW = self.ui.get_object('delImageButton')
         self.image: Image.Image = None
+        self.thumbnail: Image.Image = None
 
     def get_image(self, rec: Optional['RowProxy'] = None):
         """Set image based on current recipe."""
@@ -1513,7 +1514,7 @@ def commit(self) -> Union[Tuple[bytes, bytes], Tuple[None, None]]:
         debug("commit (self):", 5)
         if self.image:
             self.imageW.show()
-            return iu.image_to_bytes(self.image), iu.image_to_bytes(self.thumb)
+            return iu.image_to_bytes(self.image), iu.image_to_bytes(self.thumbnail)
         else:
             self.imageW.hide()
             return None, None
@@ -1533,8 +1534,6 @@ def draw_image(self):
             size = (100, 100)
 
         self.image.thumbnail(size)
-        self.thumb = self.image.copy()
-        self.thumb.thumbnail((40, 40))
         self.set_from_bytes(iu.image_to_bytes(self.image))
 
     def show_image (self):
@@ -1552,6 +1551,8 @@ def set_from_bytes(self, bytes_: bytes):
         self.orig_pixbuf = pb
 
         self.image = iu.bytes_to_image(bytes_)
+        self.thumbnail = self.image.copy()
+        self.thumbnail.thumbnail((40, 40))
 
         self.show_image()
         self.edited = True