Code Review for Job #19755

Code Review for Job #19755 - Workitem available at https://www.worklist.net/19755
I thought so as well, that's the reason why `updateBalance` had that input parameter, to match signature of signal method.  
I've tested this and worked for me -- I have qt 5.3 installed. Next line is from Qt documentation 
**The signature of a signal must match the signature of the receiving slot. (In fact a slot may have a shorter signature than the signal it receives because it can ignore extra arguments.)**