Ability to file duplicates

Signed-off-by: Amy Worrall <amy.worrall@agant.com>
Sets status to open and date to now, on all newly created radars, in order to update OpenRadar better.

Signed-off-by: Amy Worrall <amy.worrall@agant.com>
Better matching of the freeform OpenRadar text boxes to our popup menus when filing a duplicate

Signed-off-by: Amy Worrall <amy.worrall@agant.com>
Centre the file a duplicate window

Signed-off-by: Amy Worrall <amy.worrall@agant.com>
Can handle rdar:// URLs to file a duplicate

Signed-off-by: Amy Worrall <amy.worrall@agant.com>
Twitter support, via the system Twitter support (NSSharingService)

Signed-off-by: Amy Worrall <amy.worrall@agant.com>