When importing, ignore case for selection lists

[ifokkema]

When importing, selection list values are compared in a case-sensitive manner. E.g., "unknown" is not accepted but "Unknown" is. This is sometimes confusing and laborious. For those building import files regularly, it's quite a pain fixing these issues.

• Make sure that selection lists can not contain multiple values that are the same if ignoring the case.
• Make sure that comparison is done in a case-insensitive manner.
• After comparison, if a value matches, the case then needs to be converted into the case the selection list value is using.