Doc: updated the \brief statement
Doc: updated the \brief statement

Change-Id: I370c307f6e13ca22d464c842fa30f69e99ebdb37
Reviewed-by: Jerome Pasion <c10995d24f6b454503389e8d00d837aef038985d@digia.com>
Reviewed-by: Martin Smith <a8cc6484db2755056ccf1c457da8ca771f895dea@digia.com>

richardmg/qtcomponents,drgvond/qtquickcontrols,mizukusak/qtquickcontrols,richardmg/qtcomponents,jfaust/qtquickcontrols,drgvond/qtquickcontrols,jfaust/qtquickcontrols,kobolabs/qtquickcontrols,mizukusak/qtquickcontrols,mizukusak/qtquickcontrols,kobolabs/qtquickcontrols,kobolabs/qtquickcontrols,jfaust/qtquickcontrols,richardmg/qtcomponents,drgvond/qtquickcontrols