category stays empty when category is unfold, search is reset and returned no result

[Jean-Baptiste Lallement]

mako 20130924.1

TEST CASE:
1. Go to the application scope
2. Unfold the 'Installed apps' category
3. Press 'Search'
4. Enter a string that does not match any installed application e.g 'nonexistent'
  -> Verify that the category you unfold does not contain any result
5. Reset the search in the search filed (Press the circle with a cross)

EXPECTED RESULT:
When the search is reset the categories should show their default content

ACTUAL RESULT:
The category that was unfolded stays empty after the search field has been reset. The only to make content appear again is to fold the category and do a search/reset search again
This problem also exists for Music and Videos.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: unity8 7.81.3+13.10.20130924.2-0ubuntu1
Uname: Linux 3.4.0-3-mako armv7l
ApportVersion: 2.12.4-0ubuntu1
Architecture: armhf
Date: Thu Sep 26 04:51:28 2013
InstallationDate: Installed on 2013-09-24 (1 days ago)
InstallationMedia: Ubuntu Saucy Salamander (development branch) - armhf (20130924.1)
MarkForUpload: True
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
SourcePackage: unity8
UpgradeStatus: No upgrade log present (probably fresh install)