yodalee - 2014-05-19

I made some implementation on this feature. I created the setting interface in program setting and add default hotkey in qsettings file.
I wanna make user set the hotkey by press their keyboard. I inevitable have to inherit qlineedit and reimplement the keyEvent. This is a little dirty but will work. I think I will send PR after a while.
The function (set hotkey by keyboard) can be done easily in qt5 with qkeysequenceedit, however qucs is not qt5 compatible right now.