[TW-1514] Filter annotations by time

_HL on 2015-01-16T10:48:27Z says:_

When working on a task I regularly add annotations to help me remember what I have been doing. It would be nice to get a readout of what has been done on a particular day or what was done during a period.

One alternative is to split the task into smaller pieces so that this can be done within the current filter system for tasks but I find that sometimes annotations seems more appropriate. For me annotations is a great way to add information in a more relaxed way.