The grid layout had each column fixed to a width
taken as a portion of the grid width, but since
the grid has a columnSpacing defined as well,
the computation doesn't add up, helping in causing
an infinite recursion problem in the attempt of
sizing and positioning all the children of the layout
[Dirk Hohndel: heavily modified, but the basic idea remains]
Signed-off-by: Marco Martin <notmart@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
029b524f37