Category Filter dialog does show rule list minimalized

[wsteitz]

The widget does have a scrollbar but should be granted enough space to show at least 3 rules

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Imported from Launchpad using lp2gh.

• date created: 2012-03-17T09:57:51Z
• owner: bastian-kennel
• assignee: wolfer7
• the launchpad url was https://bugs.launchpad.net/bugs/957788