Revert "tdf#120836 KDE5: Clipboard: don't put images to clipboard"

My previous commit has disabled setting non-text for selection, so
this workaround is no longer needed (and it very much looks like
a workaround, I see no good reason for never putting images
in the clipboard).

This reverts commit c8b0c382c6330865df50ae7cf7360c8a2c08ebe6.

Change-Id: I0206211e3ff0adcb89f8ca5410831a428e71fb51
Reviewed-on: https://gerrit.libreoffice.org/72370
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>
diff --git a/vcl/qt5/Qt5Clipboard.cxx b/vcl/qt5/Qt5Clipboard.cxx
index d4df055..6d333d4 100644
--- a/vcl/qt5/Qt5Clipboard.cxx
+++ b/vcl/qt5/Qt5Clipboard.cxx
@@ -287,6 +287,36 @@ void VclQt5Clipboard::setContents(
            }
        }

        // Add image data if present
        if (bHasImage)
        {
            css::datatransfer::DataFlavor aFlavor;
            //FIXME: other image formats?
            aFlavor.MimeType = "image/png";
            aFlavor.DataType = cppu::UnoType<Sequence<sal_Int8>>::get();

            Any aValue;
            try
            {
                aValue = xTrans->getTransferData(aFlavor);
            }
            catch (...)
            {
            }

            if (aValue.getValueType() == cppu::UnoType<Sequence<sal_Int8>>::get())
            {
                Sequence<sal_Int8> aData;
                aValue >>= aData;

                QImage image;
                image.loadFromData(reinterpret_cast<const uchar*>(aData.getConstArray()),
                                   aData.getLength());

                pMimeData->setImageData(image);
            }
        }

        // Add text data
        // TODO: consider checking if text of suitable type is present
        {