Changed repo sign at storage window from combo box to sign button

source/ubl-settings-repomanager.c

@@ -94,7 +94,7 @@ void yon_storage_config_update(storage_config_window *window){
                     }
                     yon_char_parsed_free(sign,sign_size);
                 }
-                g_signal_connect(gtk_builder_get_object(builder,"SignatureCombo"),"changed",G_CALLBACK(on_repo_sign_changed),window);
+                g_signal_connect(gtk_builder_get_object(builder,"SignatureButton"),"clicked",G_CALLBACK(on_repo_sign_changed),window);
             }
         }
     }