Documentation search bar improvements.

[ActuallyTaylor]

Originally from FifiTheBulldog

Is your feature request related to a problem? Please describe.

The search function is great, but when I press "enter" on my keyboard, it should automatically remove the focus from the search field so that I can scroll and tap through the results immediately, rather than having to make an extra tap outside of the search bar. Tapping the "cancel" button in the search function should clear the search field.

Describe the solution you'd like

1. Clear focus from the search bar when enter is pressed.
2. Clear the search field when cancel is pressed.

[ActuallyTaylor]

Fixed this all up. The search bar now actually works like intended.