Not so long ago, your bathroom was the sort of place you dipped in and out of pretty quickly. There was no such thing as dwell time, just bath time. And it didn’t last very long. Today, all that has changed. Talk to the people who shape our 21st-century homes, and they describe the modern-day bathroom as a “cocoon”, a “retreat” and a place in which to linger and luxuriate. And while other, more public parts of the home have become showpieces designed to impress your dinner gu