Allow case insensitive search for case IDs

[Gibbsdavidl]

Problem description
For example, in CMB-CRC, there's a case ID "MSB-00241", searching for "msb" returns zero results.

Enhancement description
Would be nice to get results based on a case-insensitive search.

[fedorov]

for the record, we have over 6k patient IDs that are case-sensitive