295|UI: text comments in advanced drawing

Description of feature

• Edit text note into Adv. Drawing mode, same buttons as in Preview into Main workspace.
• Created ui_notes.py to handle ui classes regarding ORIO notes.

Same documentation is used for both workspaces as UI is consistent between them: https://felixdavid.com/stax_doc/user/artists_reviewers/reviewing_advanced_drawing.html#comment

Reordered CHANGELOG.md because of duplicate sections.

Closes #295 (closed)

How to test it

• Enter Advanced Drawing mode
• Click on Write comment

Checklist

Please check if your MR fulfills the following requirements:

• Unit tests have been added, if possible
• Documentation has been updated
• Build was run locally and any changes were pushed
• Lint has passed locally without error
• CHANGELOG.md has been updated

FYI: @awesome_dev_too