Twenty Fourteen: Search Toggle Fade In/Out

[noam@…]

The visibility toggle for the search bar and the social links are using display none;
This patch adds a nicer fade in and fade out using jQuery's fadeToggle().

[sabreuse]

Why use jQuery when we could do this with a CSS transition?

[lancewillett]

Needs discussion with iamtakashi from a bigger picture of the design and interaction goals. Me personally, I'm fine with CSS hide/show without any kind of transition.

[obenland]

-1. I agree with lancewillett, I think it would make it laggy.

[cainm]

Also fine with leaving it as is. JS seems like extra.

[iamtakashi]

In most of cases, I like quick interaction without any lag when revealing/hiding physically small UI elements. If the interaction was something that impacts page layout significantly fading could be a nice to have effect but, in this case, I'll vote to leave as it is.