[Bug 877130] [NEW] Expanding and collapsing items in the 'Installed' tab needs work

[Bapabooiee]

Public bug reported:

Expanding and collapsing the tree items in the 'Installed' tab is
unnecessary difficult, as the only functional areas are the small arrows
to the left. I think it'd make sense if they could also be
expanded/collapsed by double-clicking anywhere on them.

Another issue is trying to collapse and then expand an item without
moving your mouse. I'll offer my explanation in the form of the
following reproduction-steps:

1) Go to the 'Installed tab', and click anywhere once on any tree item (without opening it). 
2) Move your mouse to another tree item, but this time single-click its arrow . It should expand.
3) Without moving your mouse, single-click the arrow again to try to close it.
4) Witness that rather than collapsing, it just becomes selected.
5) Still not moving your mouse, click it again. And again. And again.
6) Pretend you're an end-user.

Ubuntu version:  11.10, 32-bit (fresh installation)
Software Center version:  5.0.1.4

Bonus: bug #872974

** Affects: software-center (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/877130

Title:
  Expanding and collapsing items in the 'Installed' tab needs work

Status in “software-center” package in Ubuntu:
  New

Bug description:
  Expanding and collapsing the tree items in the 'Installed' tab is
  unnecessary difficult, as the only functional areas are the small
  arrows to the left. I think it'd make sense if they could also be
  expanded/collapsed by double-clicking anywhere on them.

  Another issue is trying to collapse and then expand an item without
  moving your mouse. I'll offer my explanation in the form of the
  following reproduction-steps:

  1) Go to the 'Installed tab', and click anywhere once on any tree item (without opening it). 
  2) Move your mouse to another tree item, but this time single-click its arrow . It should expand.
  3) Without moving your mouse, single-click the arrow again to try to close it.
  4) Witness that rather than collapsing, it just becomes selected.
  5) Still not moving your mouse, click it again. And again. And again.
  6) Pretend you're an end-user.

  Ubuntu version:  11.10, 32-bit (fresh installation)
  Software Center version:  5.0.1.4

  Bonus: bug #872974

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