QT_GUI_LIB / QT_WIDGETS_LIB handled incorrectly

Code implemented in qtesthelpers_p.h is guarded by e.g. QT_GUI_LIB / QT_WIDGETS_LIB. It can be accessed, will be compiled but it's displayed as dead code in Qt Creator.

A workaround is to add the additional symbols manually:

In that case, the guarded code is displayed as active, but include resolution doesn't work and leads to bogus syntax errors being displayed: