This PR aims at making inline visualizers work on the data inspector so that more rgb encodings can be added as custom pattern language inspector rows. This was never setup to work because the inline visualizer rendering function was a private member function.

In order to be accessible from the inspector class the rendering function was made public.

Missing still is the tooltip to make it behave like other color entries.

…tor.

The previous version was trying to use the drawVisualizer function in PatternDrawer from DataInspector which was inefficient. The former drawVisualizer code was put in its own class in ui from imhex plugin library. Both DataInspector and PatternDrawer get a member field that is used to draw inline and regular visualizers. Code has been tested to make sure it works for both the inspector and the pattern drawer.