Change memory wrapper to use and update snapshot

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

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

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

...braries/skills_gui/skill_details/SkillDetailsGroupBox.cpp

...aries/skills_gui/skill_details/SkillDetailsTreeWidget.cpp

.../RobotAPI/libraries/skills_gui/skills/SkillTreeWidget.cpp