[REG 3.2.1 -> 3.3.0] Code completion

1. Open project tests\manual\cplusplus-tools\cplusplus-tools.pro from Creator's repository in Creator.
2. Configure the project with a kit using Qt 5.3.1, built with MSVC2010.
3. In main.cpp, go to the definition of

   void testCompleteSymbols()
   

4. Uncomment one of the outcommented lines.
5. At the end of this line, press Ctrl+Space
   Nothing will happen.

Creator 3.2.1 shows a popup with suggestions for code completion. Creator 3.3 should do this, too.

Found an tested by Squish test tst_CSUP06.