4. I think maybe there should appear a dialog to add the PPA when user clicks "Install new Screenlets from PPA" button, and after that he enabled the PPA there should be a list where he can choose which Screenlets want to install.
4. I think maybe there should appear a dialog to add the PPA when user clicks "Install new Screenlets from PPA" button, and after that he enabled the PPA there should be a list where he can choose which Screenlets want to install.