Allow expanding of raw long on 'enter' in trace view

[codefromthecrypt]

When the trace includes logs, I can see them in the lower pane. As I can hit 'enter' on span attributes, I feel I should be able to do the same on a log line, especially as they often wrap.

[ymtdzzz]

That's a good suggestion, I'll work on it!

[ymtdzzz]

For now, we can see the full log message in modal on Enter.
TODOs:

• full log message in modal (Show full log in modal on Enter #188)
• JSON format support