Added in filters for post-natal and emergency visits; TODO make it selectable from a list instead of hard coding it so dinamically changes based on the returned data set; TODO reduce number of calls to the server.

Added all selector; Added computed dates array (WIP).

Filter for date tests.

Add canDelete calculated property; Small improvements on date filtering.

Finally fix the all lookup to use cached results; get the clear filter working to some extend.

Buttons for better viewing pleasure