Structured message control

[rtens]

Instead of displaying messages as strings, they should be displayed in a well-formatted structure (maybe JSON). A message control should have a condensed (one line) and expanded (multi-line) state. The same control should be used everywhere where messages are displayed.

Clicking on a message should copy it in a usable form.

It should also be possible to attach a Synapse to a Zell by clicking on its Address.