improved heart rate calculations

pylance_progress

@@ -3,5 +3,5 @@ src\shared\flaresbasewidget.py  1001+
 src\window\updateevents.py  83
 flares.py  1001+
 main_unit_tests.py  153
-main.py  705
-project_manager.py 405
+main.py  691
+project_manager.py 113