Legacy Bug: AMarkerInformation needs to be updated continuously

[jeremiaheinle]

Problem

when writing new code above an existing Marker, the Marker does not stick to the code, it sticks to the line number.
This is visible whenever PartAdapter adds Markers from the MappingManager to the Editor. So for example when
there is an active feature session.
This leads to the highlighting of the wrong code.

Solution

MappingManager needs to be updated continuously.

Should be resolved when adding AST.