remove space before :focus

[xfduan]

Fixes

1. blueprint.css a space between .bp3-focus-disabled :focus
2. remove the space in template

[palantirtech]

Thanks for your interest in palantir/blueprint, @xfduan! Before we can accept your pull request, you need to sign our contributor license agreement - just visit https://cla.palantir.com/ and follow the instructions. Once you sign, I'll automatically update this pull request.