[TASK] Add DWZ Graph to showAction output

Pass DWZ and DWZ-Index data JSON encoded from Controller to Template.
Use JavaScript to create the graph.
[TASK] Add setting to hide graph on showAction output.

Add checkbox to BE to hide the graph on showAction output.
[BUGFIX] Fix reformating of code gone wrong.

This fix removes line breaks and tabs which must not be there.
[TASK] Add setting to define graph color.

Add colorpicker to BE to define the color for the graph on showAction output.