This way the props do not show in the prop-panel.

Allow for direct adding of image options.

- Remove simple variant and integrate it into the normal one with added 
switch for less controls available and smaller size.

#644

#662

Images were not showing at all.

#652

#667

The default value overwrites the value set in the parent constructor 
(Javascript...). Therefore the value needs to be intialized explicitly 
after the parent constructor has run.

#659

The index was one off, when looking up the correct child element.

Only background color makes sense here.

#669

The icon 'table' does look different for some reason. Taking the second 
best available icon.

MeasurePipe is now standalone.

20s is hopefully enough.

Expansion oanel seems not to render properly -  the last element is not 
there right away. A wait-command seems to help.