Command filter: FETCH and TERMINAL RESPONSE are separate entries (v2.7.1)

- the old "FETCH: ANY PROACTIVE" grouping label is gone: filter_label() now
  gives every command its own label, so the menu lists FETCH and TERMINAL
  RESPONSE individually — the multi-select filter (and the presets) cover the
  combinations that the grouping used to bundle
- the proactive presets keep their meaning: they name FETCH and TERMINAL
  PROFILE and reach the rest (a TERMINAL RESPONSE included) through the SW
  91xx rule; selecting FETCH now also brings its GET RESPONSE, which carries
  the fetched proactive command
- tests: the proactive-preset case follows the split (a TERMINAL RESPONSE is
  covered by 91xx, not by its name) plus a new case pinning the separate
  labels and the FETCH/GR pairing; 527 Python + 73 Node tests
- PWA_VERSION/pyproject/version.py 2.7.1, SW cache simtrace-analyser-v81

simtrace_analyser/version.py

@@ -1,3 +1,3 @@
 """Single source of truth for the SIMtrace Analyser version."""
 
-__version__ = '2.7.0'
+__version__ = '2.7.1'