Kinda, knew about it but 'seems' to be quite useless with its limited functionality and never use it, the problem with the code completion toolbar apart from being called the wrong name, 'function quick jump' would be closer to its functionality. It only lists functions that are in that file, so if you are in the .cpp file you will not be able to jump to any function defined in the header file. Further you are not be able to jump to the definition of these, see variables declared in the class header and you cannot see base and derived class information, I believe the later is not on by default in symbol browser but is extremely useful.
Reminded about the code completion now, it would seem the code is already there to determine the current function selected and it would be a quick hack to implement this feature.
NR