[New Tip] Design tip no3 - Interactive elements

[dboudreau]

Reference: http://w3c.github.io/wai-quick-start/designing.html#ensure-that-interactive-elements-are-easy-to-identify

The quick tip currently reads: "Provide distinct styles for interactive elements, such as links and buttons, to make them easy to identify. For example, change the appearance of links on mouse hover, keyboard focus, and touch-screen activation. Ensure that styles and naming for interactive elements are used consistently throughout the website."

I suggest we make a few small changes, to read: "Provide distinct styles for interactive elements, such as links and buttons, to make them easy to identify visually. For example, change the appearance of links on mouse hover, keyboard focus, and touch-screen activation. Ensure that styles and naming for interactive elements are used consistently throughout the website to help users recognize common patterns."