don't hide treeview and notebook when some package is available but not installable

[Nicolò Chieffo]

Binary package hint: update-manager

When you update the list and there are only pending packages that can't be installed (because they need to be kept for dependancies problems) the treeview and the notebook are set not sensitive.
This would be valid only if there is no package at all, so my patch insert another check to see if there are kept packages.

Please review :)

[Nicolò Chieffo (yelo3)]

new patch, corrects a stupid error

[Philip Muškovac (yofel)]

Filed a merge request with a slight change:
I replaced
if not self.cache.keepCount == 0:
with
if self.cache.keepCount() == 0:
as that gives me the intended behaviour

[Launchpad Janitor (janitor)]

This bug was fixed in the package update-manager - 1:0.142.7

---------------
update-manager (1:0.142.7) maverick; urgency=low

  [ Mohamed Amine IL Idrissi ]
  * Cache is no
  longer initialized when an operation is not authorized.
    LP: #394608
  * List of updates is active when there are only kept packages.
    LP: #601127 (thanks, Nicolò Chieffo)

  [ Michael Vogt ]
  * merged lp:~simono/update-manager/fixes-bug-563640, many thanks
    (LP: #563640)
  * merged lp:~yofel/update-manager/lp601127 (LP: #601127)

  [ Jean-Baptiste Lallement ]
  * UpdateManager/Core/MyCache.py:
    - catch network error when fetching 3rd party changelogs
      (LP: #565896)

  [ Brian Murray ]
  * UpdateManager/UpdateManager.py: grammar fix
 -- Michael Vogt <email address hidden> Wed, 11 Aug 2010 09:04:47 +0200