Improve the find user interface
Currently there are two main issues with the find UI in evince:
- The find box is shown in a bar that slides down from under the header bar
- Results are shown in a sidebar
Both of these result in the find UI being very large and invasive - you press the find button and these big elements slide in, disrupting the existing view.
A better way to do the find UI would be like gedit or Builder - do a smaller overlaid search box, which indicates the number of results. This is a good standardised pattern.