Simplify descriptions of Qt Quick wizards.

The current template mechanism does not support descriptions with
multiple paragraphs. Work around this by making the descriptions
shorter.

Change-Id: I3980778ce3b022430cc838f2c200f003dae0081c
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
do not ignore exceptions at register file type

Change-Id: I935158e523549d55e58b4e4b7be0af2dac2058d6
Reviewed-by: Kai Koehne <kai.koehne@digia.com>