What's Next? 0.16.1

DETACHED TODAY WINDOWS

Settings (enabled by default):
- SHOW TODAY TIMER WINDOW
- SHOW TODAY TASKS WINDOW

Today Timer Window:
- Independent of the main addon window.
- Shows only today's incomplete tasks that have a time.
- Synchronizes countdowns once per second.
- Completed tasks disappear from the timer window.
- Background turns red when any active timer has 10 minutes or less remaining.
- Overdue incomplete timers remain highlighted.
- Window is movable.

Today Tasks Window:
- Independent of the main addon window.
- Shows all tasks scheduled for today.
- Includes task time when present.
- Tasks can be completed/uncompleted directly with a checkbox.
- Window is movable.

Both windows remain visible while the main Whats Next? window is closed.
