Code cleaning for V0.11 about trackeditor HOT 4 CLOSED

Refactor schema for plots.py:

• refactor_plotspy.pptx

from trackeditor.

plots.py

• can be this somehow refactor?
  • DONE

constants.py

• remove TODO and create issue if needed
  • removed with #24 -> DONE

from trackeditor.

FLAKE8

• Review all the output of flake8 from github actions
  • DONE

db_handler.py

• remove TODO and create issue if needed
  • DONE

gpx.py

• remove TODO and create issue if needed
  • DONE

from trackeditor.

General

• Include file header
  • DONE

track.py

• Organize public and private classes in track.py
  • DONE
• Include a small comment to describe methods, when not fully clear: fix_elevation, change_order
  • Not needed after analysis
• Review methods which may be short but bulky: reverse_segment
  • Not needed after analysis

from trackeditor.