feature: stop all button

...killManagerPlugin/SkillManagerMonitorWidgetController.cpp

source/RobotAPI/libraries/skills_gui/SkillMemoryGui.cpp

source/RobotAPI/libraries/skills_gui/SkillMemoryGui.h

...raries/skills_gui/executions/SkillExecutionTreeWidget.cpp

...ibraries/skills_gui/executions/SkillExecutionTreeWidget.h

...otAPI/libraries/skills_gui/memory/SkillManagerWrapper.cpp

...obotAPI/libraries/skills_gui/memory/SkillManagerWrapper.h