Make the contexts configurable-- choose a name and icon
If you accidentally click a 'completion' box, there is no way to clear it w/out opening the task to edit
The 'preview' always shows at the top of the page if you click a task. If you're scrolled down a long task list, you can't see it w/out scrolling up. It should be placed on the screen. Relative to the line you clicked on?
The 'preview' should close itself after an interval. Configurable, of course. Maybe 5 seconds? I accidentally click on a line and then have to click 'close'
Popup calendar for the date
Should default something into the due date... configurable like today+3
File -> Print in the browser only ever prints one page!!