Changed the width of the notification qframe

The size of the qframe was not enough to display the qml, it seems that
there is a large margin around it
Added a workaround for sizing qml window on osx

Some of the size settings are arbitrary we have to change this for the beta
lots of improves, signals for settings, session manager working, fixes on locator
Merge pull request #1527 from diegosarmentero/master

lots of improves, signals for settings, session manager working, fixes on locator
Merge pull request #1526 from perrito666/master

Changed the width of the notification qframe