SVN_SILENT made messages (.desktop file)
Revert "Use qobject_cast when checking the return value via if"

As Thomas writes, using qobject_cast doesn't make any sense here:

> The check is for the verticalScrollBar() heap member
> If m_scrollParent is not a QAbstractScrollArea, this will segfault in either
> casting case.

This reverts commit 231975037aa307a0b28badfea4df97674d39858e.