Added execution state for resetting robot in UI

catkin_ws/src/learn_environment/CMakeLists.txt

...src/learn_environment/docs/for_developers/define_tasks.md

...n_environment/include/learn_environment/execute_frame.hpp

...n_environment/include/learn_environment/task_executor.hpp

...rn_environment/include/learn_environment/task_manager.hpp

catkin_ws/src/learn_environment/resource/icons/failed.png

catkin_ws/src/learn_environment/resource/icons/help.png

catkin_ws/src/learn_environment/resource/icons/loading.gif

catkin_ws/src/learn_environment/resource/icons/play.png

catkin_ws/src/learn_environment/resource/icons/robot.png

catkin_ws/src/learn_environment/resource/icons/succeeded.png

...in_ws/src/learn_environment/resource/learn_environment.ui

catkin_ws/src/learn_environment/resources.qrc

catkin_ws/src/learn_environment/src/execute_frame.cpp

catkin_ws/src/learn_environment/src/learn_environment.cpp

catkin_ws/src/learn_environment/src/script_worker.cpp

catkin_ws/src/learn_environment/src/sidebar.cpp

catkin_ws/src/learn_environment/src/subtask_item.cpp

catkin_ws/src/learn_environment/src/task_executor.cpp

catkin_ws/src/learn_environment/src/task_manager.cpp