Reference finder ignores signal emits

Steps to reproduce:

• Open a toplevel source tree with qtdeclarative included
• Open qquicktextedit_p.h
• right click on the definition of the textChanged() signal in line 295
• select "Find Refrences To Symbol Under Cursor"

Expected result:

All references found, including signal emissions in qquicktextedit.cpp

Actual result:

Regression => P1