Search, replace and profile update

[jrodriguezsoto]

Use notify listeners to let the UI know when there was a future still loading. While this is happening the UI hides the search bar disabling user input while the future loads.

In order to change the stop the app from creating new pages every time a new search was made I replaced push with replace. This automatically disposes the previous search made instead of pushing onto the stack.

As far as the UI design for the profile page goes I wanted to keep it simple and respect the preset colors so it matches the app style.