[2.3] Manager Theme: Fix excessive space in package update window

Minor "fix" / adjustments to the package update window which had too much height and too much spacing/padding between description and the radio option.

before:
![bildschirmfoto 2014-07-21 um 14 51 46](https://cloud.githubusercontent.com/assets/445501/3643597/e2422cb0-10d5-11e4-9aef-8b7ae5ce694d.png)

after:
![bildschirmfoto 2014-07-21 um 14 52 16](https://cloud.githubusercontent.com/assets/445501/3643598/e5d6ea32-10d5-11e4-99ca-238e59c36e0a.png)