A special text editor that allow editing of a list of
(enty,number) pairs. Only semantic elements should be
selectable.
The mapping / editor configuration is not required to
be configureable, it can be hardcoded into the editor
at first.
The complete implementation of this scenario should
test-driven and must not use artifacts from version
0.0.1. (new development).
It should be validated that number is an integer
greater zero. If not, errors should be displayed in a
user-friendly way.
The navigation should be keyboard-based only,
CTRL+DOWN,CTRL+UP should allow navigation between
different semantic tree levels, UP,DOWN should allow
navigation within the same semenatic tree level.