Feature Request: Better PPA in Software Center

[Nubelite]

Issue: Many people install PPA's and some find out the hard way that a PPA has more then just what they want from it. Usually after doing an update on their system.

Idea: When adding a PPA it does not override the other apps in the default ppa, but instead offer another button in the software center. When searching for the app in the PPA you just installed there is another install button on the apps description page right under the default button. Also have it list the PPA the additional button will install from. Once installed then the update manager will update that package from the added PPA and only the packages that were installed from it. leaving the rest of the packages in the PPA untouched so it will not override a package on the default PPA.