Invalid carver registrations need to be eliminated from statistics and in some cases any other actions

[mlinnen]

There are a few ways that an invalid carver registration comes into the application:

• A user registers more than once
• A blank registration sneaks in

In most cases we need to remove the registration from various features on the CWC Showcase application

• Dashboard statistics
• Competitors list - in some cases we might want to include the registration so that the entry can be pulled up and looked at. A specific case for this is a duplicate entry. The carver might come into the show with an entry form that says carver id 99 which was a duplicate entry for their carver id 98 entry which is what they paid their fee on.
• Competitors export

Proposed solution for this issue:

• Add a new field called "Status" to the competitors spreadsheet that defaults to empty string
• Allow a competitor manager to change the value of this field to the following: Blank, Duplicate, or Invalid.
• Change the dashboard statistics to only include Status = Blank
• Change the competitor list to only show competitors with Status = Blank or Duplicate
• Don't let anyone except Admin edit Duplicate registrations.
• Competitor read only or manager can view the Duplicate registrations but they cannot edit them.