Compile fix for 99f22de6baeb6488e9523f18e01c4b159766e0b7

Change-Id: Iac7bc5b2d771959f370760a9b1cd2a0e5d0fa2a5
Reviewed-by: hjk <hjk121@nokiamail.com>
CppTools: Fix displaying symbols of CppLocatorFilter

The left column of the locator filter displayed the fully qualified
name, which is a bit too long...

Regression introduced by commit 760aa0f.

Change-Id: I57fb44cd205c6e54158de22b6638e4a28014749c
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>