[RAVE-794] Improve error messages for user in W3C add widget page.

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 0.15
• Component/s: rave-web
• Environment: Sometimes it is not obvious why a widget cannot be added because the problem is not identfied in the UI. (when you try to add a widget that is already imported, for example)
• Assignee: Paul Sharples
• Reporter: Paul Sharples
• Created: 21/Sep/12 08:44
• Updated: 21/Sep/12 16:09