Improved repeating ticklers

You can specify that ticklers are once, daily, weekly, monthly or yearly. In lists, ticklers marked as "once" show a checkbox (the way all ticklers used to do). If they are any of the others then the in lists they shows the +d/+w etc button that is applicable. So for instance you can just mark a weekly tickler as done for that week by clicking the +w without having to open the tickler. Thanks to Kralik on the mailing list for the inspiration.

Ps, I'm going to dump the disabled/enabled attribute for ticklers unless someone can think of a good reason to keep it. If you need to "disable" a tickler then just mark it as done, right?