Fixes #1207045 extra whitespace in charm details

Fixes #1207045 extra whitespace in charm details

- When going from fullscreen editorial or search results to a charm details
the height was always matched to the editorial/results height. This causes
extra whitespace in the charm details layout.
- This was due to the indidicator spinner used for activity. It's using a
yui-hidden class when not showing to hide, but that causes it to still force
height.
- In the end, we can destroy the outdated content when we navigate to the
details. In fact, we should clean it up regardless. This adds code and a test
to verify that the .fullscreen() browser subapp function will clean older
editorial/search results views.

QA:

Go to /fullscreen, click on a charm. The height should be tighter to the end
of the charm details content. Compare against
comingsoon.jujucharms.com/fullscreen (and the same charm)

https://code.launchpad.net/~rharding/juju-gui/ie-whitespace-1207045/+merge/180366

(do not edit description out of merge proposal)

[rharding, 2013-08-15 15:50:52]

Please take a look.

[matthew.scott, 2013-08-15 15:59:12]

LGTM, thanks!

[j.c.sackett, 2013-08-15 15:59:39]

LGTM, thanks!

[rharding, 2013-08-15 16:16:51]

*** Submitted:

Fixes #1207045 extra whitespace in charm details

- When going from fullscreen editorial or search results to a charm details
the height was always matched to the editorial/results height. This causes
extra whitespace in the charm details layout.
- This was due to the indidicator spinner used for activity. It's using a
yui-hidden class when not showing to hide, but that causes it to still force
height.
- In the end, we can destroy the outdated content when we navigate to the
details. In fact, we should clean it up regardless. This adds code and a test
to verify that the .fullscreen() browser subapp function will clean older
editorial/search results views.

QA:

Go to /fullscreen, click on a charm. The height should be tighter to the end
of the charm details content. Compare against
comingsoon.jujucharms.com/fullscreen (and the same charm)

R=matthew.scott, j.c.sackett
CC=
https://codereview.appspot.com/12997043