UI improvements on Animal view

[fedjo]

• Birth date : the hour is not useful. It must be removed

• Animals list default display: 10 entries as default display, it’s not enough. 25 entries would be a better default display

• Filtering with species

[arruda]

probably will need to have the "all" filter in the animals "sub-menu" as well, (will be the only one available at first, since no animals will be registered, and there wont be any species)