Searchbar

[raclim]

I have verified that this pull request:

• has no linting errors (npm run lint)
• is from a uniquely-named feature branch and has been rebased on top of the latest master. (If I was asked to make more changes, I have made sure to rebase onto master then too)
• is descriptively named and links to an issue number, i.e. Fixes #123

[catarak]

i think a better name for this reducer/file is just 'search'

[catarak]

Style changes:

1. The border of the input should be the same as the input in the "Find" functionality
2. The magnifying glass appears to not be centered—I think it's 1px too close too the top, and 1px too close to the left.

[catarak]

this looks so good and i think it's ready to be merged!