[Bug 1056098] [NEW] Update Manager forgets user's selection if settings window is opened

[Mark]

Public bug reported:

This issue applies to update-manager in both 11.10 and 12.04.

Steps to reproduce:
 - Start Update Manager
 - Spend several minutes reading descriptions of the various updates, selecting some and de-selecting others.
 - Click the Settings... button at the bottom of the window
 - Without changing any settings, click Cancel to close the settings window.
 - Update Manager forgets which packages you selected before and instead reloads the list of updates (maxing out CPU for several seconds), with all updates selected.

Update Manager does not need to reload/refresh the list of updates if no
settings have changed.

Even if the user did change some settings, it could remember which
updates were selected/unselected, and after reloading the list, make the
initial selection state match what the user chose before. (As opposed to
defaulting to having all updates checked.)

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1056098

Title:
  Update Manager forgets user's selection if settings window is opened

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  This issue applies to update-manager in both 11.10 and 12.04.

  Steps to reproduce:
   - Start Update Manager
   - Spend several minutes reading descriptions of the various updates, selecting some and de-selecting others.
   - Click the Settings... button at the bottom of the window
   - Without changing any settings, click Cancel to close the settings window.
   - Update Manager forgets which packages you selected before and instead reloads the list of updates (maxing out CPU for several seconds), with all updates selected.

  Update Manager does not need to reload/refresh the list of updates if
  no settings have changed.

  Even if the user did change some settings, it could remember which
  updates were selected/unselected, and after reloading the list, make
  the initial selection state match what the user chose before. (As
  opposed to defaulting to having all updates checked.)

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