Roadmap Planner - Prevent Markers text to overlap

Hi,

Reproduce steps is simple :
1. add a new Roadmap planner macro on any page
2. in edition mode, add two markers
3. Drag markers so they are very close :
markers text is overlapping. Impossible to read

Impact : impossible to represent two events which are close in time...

This is even more occurring as it is impossible to scale the roadmap, hence we cannot "zoom" on the timeline to avoid having two markers too close.

Regards
Nicolas