- list creates a child tree element per item
  - the key is a numerated index
  - context menu on the item deletes this exact item
- context menu handling now separated on which options are available and
their execution

Bugs to fix:
- Type of Dict not correct (see example "cascaded_list")
- Keys of dict not editable when in list (e.g. type
List<Dict<something>>)

next things to do:
- converters for dict, list, intenum (partially just check)
- tuple & pair
- sanity checks after checking rest of converters

- make AronTreeWidgetController QObject -> now handles context menu
actions of the contained treewidgetitems
- SkillManagerMonitorWidget makes first column editable if the parent is
a dict

... except String atm

Inside the SetterVisitor, the code now generates enough children to view
all attributes.

Still TODO:
 - adaptively erase children
 - add context menu to add & remove children
 - check that edits persist / are picked up before execution

Dict Unrelated TODOS:
 - make Leaf types editable in GUI
 - do same treatment for lists

SickLaserUnit: using cmake target instead of custom mechanism

See merge request ArmarX/RobotAPI!280

removing add_definitions: its affecting all targets. now, it's being set via the imported target sick_scan_base::sick_scan_generic

Fix ukfm static dimension

See merge request ArmarX/RobotAPI!279

# Conflicts:
#	source/RobotAPI/libraries/armem_gui/MemoryViewer.cpp

fixed ltm enable via GUI (marshalling exception on release builds) and commented out locks from memory viewer

added mutexes to memory viewer to avoid data races. Removed data race of removed address in asynch method

UseRobotAPI: adding OpenCV to prevent linker errors in subsequent packages

See merge request ArmarX/RobotAPI!275

Feature/kinematic unit gui simplification

See merge request ArmarX/RobotAPI!274

Kinematic Unit: new method to retrieve debug / all info at once

See merge request ArmarX/RobotAPI!273