Only display patients that are part of search result

Instead of loading the full set of patients in the list of clients, we potentially need to change the approach to only display search results. The advantage of this approach potentially are:

• It will train the user to always search their client. User won't be using the scroll to search for their client, but will enter keywords to search for the client.
• Less data need to be loaded in the client list. This should make the apps load the client list faster.

Implementation probably need to take the google approach with their homepage. When opening the client list page, the search field will be in the middle. As user start entering the search term, the search field will move to the top part of the page (similar to what we have right now) and search results will be displayed and also registering new clients button gets displayed.