Adapt search to handle offline filtering

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

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

...ce/RobotAPI/libraries/skills_gui/skills/SkillGroupBox.cpp

source/RobotAPI/libraries/skills_gui/skills/SkillGroupBox.h

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

...ce/RobotAPI/libraries/skills_gui/skills/SkillTreeWidget.h