General improvements and fixes

This release is all about improving your app experience and fixing bugs. Here are the top highlights:

• You can now keep completed tasks at their current position within a list, and not move them to the "Done" section. Simply edit the list and toggle the option "Keep completed tasks separate".
• Completed tasks within the "Done" section are now sorted in the order of completion, making it easier to undo accidental completion.
• Today screen is scrollable again.
• Pinned lists look better.