Valid part of legal name disallowed in name field

[FooNicholas]

Legal names can include s/o which includes a non-alphanumeric character

To replicate:

1. Open any pre-existing wedding using open command e.g. open 3

2. Enter command: add n/Harry Kane s/o Ryan Kane p/13701978 e/kane@example.com a/789 NUS Rd t/bridesmaid