Add search term to history during replace (all) (DistributedProofread…

…ers#235)

Replace All did not add the search term to the search history.

src/guiguts/search.py

@@ -394,6 +394,7 @@ def replace_clicked(
             "break" to avoid calling other callbacks
         """
         search_string = self.search_box.get()
+        self.search_box.add_to_history(search_string)
         replace_string = self.replace_box.get()
         self.replace_box.add_to_history(replace_string)
 
@@ -430,6 +431,7 @@ def replaceall_clicked(self) -> None:
         Replace in whole file or just in selection.
         """
         search_string = self.search_box.get()
+        self.search_box.add_to_history(search_string)
         replace_string = self.replace_box.get()
         self.replace_box.add_to_history(replace_string)