As a user I'm confused if I started dev to a component but forwarding failed and are therefore not listed

[adietish]

Taken from #697 (comment)

(@sbouchet) If your idea is to show 'no URL', it should be clear that it's no ACTIVE url that can be browsed, because when you describe the component using odo, it always shows URL that are listed on the devfile.
What i propose is to display more information.

• NO URL only when there is no URL in the devfile
• URL in grey state, when there is URL in the devfile but the component is not running
• URL in White/Green state, when the URL is active

this is somehow similar to what odo does, and we can rely on it to parse the state ( try out with describe commands) .