Manageable: Nested ToDo Listsv2.5

What changed

• UXAdded ability to toggle visibility of completed tasks in Task and Action lists
• UXIntroduced two-finger long press gesture to access list settings directly
• New featureAdded Markdown export option for Task lists via two-finger pull-up gesture
• UXUpdated Task exports to respect the 'show completed tasks' visibility setting
• New featureAdded option to export Action lists as Markdown text grouped by path

Original release notes

- You can now hide completed tasks in Task lists or show completed tasks in Action lists. These are 2 independent settings that you can access either in the Settings screen or directly from a list view using a two-finger long press.
- New "Export Markdown" option for Task lists (2-finger pull-up for export options). 
- Both Outline and Markdown options in Task export respect "show completed tasks" setting so you can include or exclude completed tasks in your exports.
- New option to export Action lists as Markdown text grouped by path.