Enhancements: more editing abilities and calendar reminder system

[mauricev]

My user has the following questions/requests:

1. The only blank field in these records is the end date, however, I cannot edit this. I only have the option to delete the breeding pair, which I do not want to do. Is there a way to mark crosses as inactive?

2. I also want the ability to edit the litter information, as I will not know the genotyping information until 1-3 weeks after the litter is born.

3. Are there plans to add a calendar/reminder system to Alyx? I have listed some reminders related to Breeding Pairs/ Litters that would be particularly helpful for me:
   3a) Remove father reminder (yes/no) If yes, set reminder to 14 days after animals are crossed.

3b) Mating confirmation (optional field, date format). Here the researcher will note the date that a plug is detected in the female if that information is relevant.

3c) Experimental reminder (yes/no). If yes, add fields for reminder date and short description. (For instance, if a mother must be injected IP with BrdU or tamoxifen for developmental studies).

3d) Check for litter (automatic, 21 days after initial cross date)
Birthdate Confirmation (yes/no). Sometimes the birthdate is approximate, but for developmental studies it is important to confirm whether the birthdate is exact.

3e) Collect genotyping sample (Optional, yes/no). If yes, add fields for sample collection age (for instance, a number can be entered "7" and that will automatically set a reminder to collect genotyping samples 7 days after the litter is born.

3f) Wean litter (automatic, 21 days after litter is born)