Extension of the mouseClick function (add proportion and offset)

[53845714nF]

Add new parameters (proportion and offset) to the mouseClick function. For the end User this will end in two new Functions mouseClickWithProportion and mouseClickWithOffset. It will be possible to click e.g. sliderarea at certain positions.

Can be used in Python, for example, as follows:

from xmlrpc.client import ServerProxy

session = ServerProxy('http://localhost:9000')
session.mouseClickWithProportion('mainWindow/sliderarea', 0.4, 0.5)