make DAOs search input execute less often

[dkent600]

Currently the DAOs search input executes a DAOs query and re-render of the page on every keypress when the input value is longer than two characters. This is often going to cause a lot of unnecessary queries and renders.

So I would like to propose that change this behavior in either of two ways:

1. execute on enter and blur (loss of focus), or
2. add a search button to the right of the input field, and an 'x' in the input field to clear it. Clicking either one executes.

I think my vote would be 1. This is how I'd like to implement the new proposal search input.

[orenyodfat]

see daostack/alchemy#2104