Don't release the printer after using it to change a property

The printer should not be released after changing a property on it as it
is still needed by QPrinter elsewhere. It is released as appropriate
automatically already.

Task-number: QTBUG-32831

Change-Id: Idb2d98b25b62f343015a0a0fb3c9a0d506546132
Reviewed-by: Liang Qi <liang.qi@digia.com>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Doc: fix links to documentation in other modules

Add the depends variable with all modules as values,
because the QT variable value documentation should list
the import statements for all modules.

This patch enables linking to other modules.

Change-Id: I521ac22bac27d79537c14583f6592251288974a4
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>