Search field is hidden when window is minimum width

[Matthew Paul Thomas]

Ubuntu Software Center 5.0.1.5, Ubuntu 11.10

1. Resize the window to its narrowest possible width.

What you see: The search field disappears.
What you should see: The search field is still present.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Felix Gehring (gehringfelix-i)]

The problem worsens when there is an active process (installation or removal) running in the software center, presumably because with the new "Process" tab there is less space for the search field.
In that case the window does not even have to be very narrow for the search field to be hidden. In fact, with the default size of the software center in 12.04 the search field disappears upon installation of a new application.

[Robert Roth (evfool)]

This does not happen using software center 5.2.1 on Precise by default (minimized to its minimum width), however the search entry disappears when there is an installation/removal in progress.

[Robert Roth (evfool)]

As with the default size this doesn't happen anymore, only when the Progress tab appears, I am marking this as a duplicate of bug #876657.