add version to title bar

Author: pricklygorse

backgroundremoval.py

@@ -1242,7 +1242,7 @@ def dropEvent(self, event):
         super().dropEvent(event)
 
     def update_window_title(self):
-        base_title = "Interactive Image Background Remover"
+        base_title = "Interactive Image Background Remover v1.7"
 
         if not self.image_paths:
             self.setWindowTitle(base_title)