Doc: several updates to the module page.

1)Setting \qtvariable in module page.
\qtvariable indicates the QT variable needed in .pro files.

2)WS fixes.

Qt Quick 1 is deprecated but it is still nice to update the module page.

Change-Id: I5358a03566589a6910469c0bbd4a717e90be1c34
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Reviewed-by: Martin Smith <martin.smith@digia.com>