[ISIS-1446] Extend the Wicket viewer client-side file-open-dialog to allow file extension to be specified.

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.12.2
• Fix Version/s: 1.13.0
• Component/s: Core, Core: Viewer: Wicket
• Assignee: Dan Haywood
• Reporter: Dan Haywood
• Created: 16/Jun/16 16:25
• Updated: 11/Jul/16 19:35
• Resolved: 16/Jun/16 17:55