[GTK3] "Go Back" menu item is available when Back button is not

[Matthew Paul Thomas]

Occurs with: software-center-gtk3 trunk r2155, Ubuntu Ocelot
Does not occur with: software-center trunk r2155, Ubuntu Ocelot

Based on test case sc-007 <https://wiki.ubuntu.com/SoftwareCenter#navigation-back-forward>:

1. Launch USC.
2. Choose "View" > "Go Back" (or, if the "Go" menu has been implemented, "Go" > "Back").

What happens:
* The menu item is sensitive.
* Choosing it makes the Forward button sensitive, but does nothing else.

What should happen:
* The menu item should not be sensitive.
* It should not be possible for the Back menu item to be sensitive while the button is not, or vice versa.

See also bug 830238.

[Kiwinote (kiwinote)]

Fixed in branch linked.

[Launchpad Janitor (janitor)]

This bug was fixed in the package software-center - 4.1.18

---------------
software-center (4.1.18) oneiric; urgency=low

  [ Michael Vogt ]
  * lp:~alexeftimie/software-center/packagekit-backend:
    - add packagekit backend, thanks Alex Eftimie
    - this allows using "software-center-gtk3 --packagekit-backend"
  * softwarecenter/ui/gtk3/panes/viewswitcher.py:
    - pygi compat fix, Gtk.CheckMenuItem() != Gtk.CheckMenuItem.new()
  * lp:~mvo/software-center/license-key-infrastructure:
    - allow adding license keys during a purchase
  * utils/submit_review_gtk3.py:
    - gtk3 fixes
  * softwarecenter/ui/gtk3/widgets/stars.py:
    - add get_rating() to make the submit_review_gtk3.py work
  * softwarecenter/ui/gtk3/widgets/buttons.py:
    - show correct price in the FeaturedTile (if there is one)
  * softwarecenter/ui/gtk3/widgets/reviews.py:
    - make the reviews UI more network change aware
  * softwarecenter/db/pkginfo_impl/aptcache.py:
    - fix file monitor const issues with gio vs Gio
  * utils/piston-helpers/piston_get_reviews_helper.py:
    - fix offline reviews
  * fix "What's New" category sorting (LP: #830188)
  * add new sort "By Newest First" combobox
  * hide sort combobox for if the category has a forced sort mode
    (like whats new) LP: #830234

  [ Alex Eftimie ]
  * lp:~alexeftimie/software-center/backend-refactor
    - fixes in the abstract channels backend

  [ Matthew McGowan ]
  * lp:~mmcg069/software-center/small-fixes:
    - theming improvements
    - fix up installedpane search to include uncategorised items as well
    - fix up the show-hide technical items in the installedpane
    - fix the description resizing, prevent wierd spazzing
  * lp:~mmcg069/software-center/Bug828223:
    - make feature tiles update the installed state overlay upon
      appropriate aptdaemon transactions
    - add installed ticks to the lobby and subcat tiles (Bug #828223)
  * lp:~mmcg069/software-center/Bug830691:
    - improve visual connection in the details (Bug #830691)
  *lp:~mmcg069/software-center/details-tweaks
   - add the ratings count to the bottom of the stars in the
     detailsview header
  * lp:~mmcg069/software-center/Bug830218
    - remove category as per Bug LP: #830218
  * lp:~mmcg069/software-center/itemview-work:
    - make review list look like mockup

  [ Aaron Peachey ]
  * softwarecenter/ui/gtk3/views/catview_gtk.py:
    - remove 'More' button from sub-category top rated sections
    - increase number of apps in top-rated feature frames from 8 to 12
    - add sub category name into frame header for subcategory toprated
     (LP: #830272)
  * softwarecenter/ui/gtk3/views/catview_gtk.py:
    - provide standard method for adding tiles to Flowable grid to
      simplify repeated append code (and DRY)
  * lp:~aaronp/software-center/gtk3-bugs:
    - fix size request, make nr-reviews in the featured buttons
      consistent with the applist

  [ Kiwinote ]
  * data/ui/gtk3/SoftwareCenter.ui,
    softwarecenter/ui/gtk3/app.py:
    - set back/forward menuitems sensitive at the correct times (LP: #830194)
  * softwarecenter/backend/aptchannels.py,
    softwarecenter/backend/channel.py:
    - don't include an 'all availab...