[Qt-creator] Small (but great) mouse button feature request

[bd.anon at free.fr]

Browsers allow to move back to the previous (next) page using the 4th
(5th) button on 5 button mouse.

I would love to see Creator implement the same type of action with the
5th button when, having used the F2 key to go to a definition, it is
time to go back to the original source code.

Would be even greater if the 4th button had the same effect as the F2
key.

It's a small feature, but it would save lot's of time, and perhaps
more importantly, would allow the hand to automatically check
definition and go back to source code nearly unconsciously, without
disrupting the chain of thoughts...

Should be simple to implement, as the code to navigate the code is
already build within Creator.