* offer removal of no-longer-supported apps
* improve countrymirror detection
UpdateManager.Common.aptsources.py:
- make the distro detection in sources.list more clever by using the
origin informaton to avoid adding full uris to (unofficial/internal)
mirrors
- make it possible to inherit the mirrros from a ParentSuite (for
the childs)
Misc:
- add download size to treeview
- add /etc/apt/software-properties.d dir where the user can
install matchers and templates
- handle cases like "deb http://bla/ dist sec1 sec2 # comment"
- rework the add channel/cdrom dialogs
- d'n'd for key files
- use one row per section and not one per channel in the treeview
- sort the sources by dist