Issue navigator having problem filtering issues with a German character - ß for custom field values. The problem happened only to custom field which will stored its values in STRINGVALUE column in customfieldvalue table e.g. multi select custom field.

When a custom field's value with ß character e.g. Gießen, issue navigator won't find unless there's another value with SS replacing ß e.g. Giessen.

Steps to reproduce:

• Create a multi select custom field
• Add two values for its option:
  • Gießen
  • Giessen
• Associate the custom field to issue create screen (Default Screen)
• Create two issues with selected value Gießen and Giessen respectively
• Go to Issue Navigator and search for Gießen value for the custom field
  • No issue will show up in the result
• Search for Giessen
  • Two issues will show up(one with the value Gießen and another one with Giessen)