Package manager/updater is wrongly layouted

While installing something through package manager, you often want to see details while debugging. However, it's hard to see the details because the textedit is not layouted to the tab widget container, so resizing the window doesn't make it bigger.

Additionally, resizing the updater too small makes "Hide details" button almost disappear, which probably shouldn't happen as it looks quite ugly (and you can't really click on it either).