Fix text being cut off at the right side in print preview.

This patch now also copies the state of the QPainter returned from
QPaintEngine::painter for the first page of a print preview, as it is
done for all other pages of a preview in QPreviewPaintEngine::newPage().

Task-number: QTBUG-30621
Change-Id: I50001231c4006b9627ff80504618cbe0fa6d9f65
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>

src/printsupport/kernel/qpaintengine_preview.cpp

@@ -94,6 +94,7 @@ bool QPreviewPaintEngine::begin(QPaintDevice *)
     page->d_func()->in_memory_only = true;
     d->painter = new QPainter(page);
     d->engine = d->painter->paintEngine();
+    *d->painter->d_func()->state = *painter()->d_func()->state;
     d->pages.append(page);
     d->state = QPrinter::Active;
     return true;