fix: call configure_controller on 'unconfigured' state instead load_c…

…ontroller (#1794) (#1798)

(cherry picked from commit 0ba1428)

Co-authored-by: Santosh Govindaraj <75157452+SantoshGovindaraj@users.noreply.github.com>

rqt_controller_manager/rqt_controller_manager/controller_manager.py

@@ -260,7 +260,7 @@ def _on_ctrl_menu(self, pos):
             if action is action_configure:
                 configure_controller(self._node, self._cm_name, ctrl.name)
             elif action is action_spawn:
-                load_controller(self._node, self._cm_name, ctrl.name)
+                configure_controller(self._node, self._cm_name, ctrl.name)
                 self._activate_controller(ctrl.name)
         else:
             # Assume controller isn't loaded