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 c8b0c382c6.

Change-Id: I0206211e3ff0adcb89f8ca5410831a428e71fb51
Reviewed-on: https://gerrit.libreoffice.org/72370
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

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
         {