Merge branch '607-donations-addlink-attribute-sponsored' into 'develop'

Resolve "Donations: AddLink-Attribute "Sponsored""

Closes #607

See merge request !449

extensions/t3o_donation/Resources/Private/Templates/Donation/List.html

@@ -23,7 +23,7 @@
                         <td>
                             <f:if condition="{donation.url}">
                                 <f:then>
-                                    <f:link.external uri="{donation.url}">{donation.name}</f:link.external>
+                                    <f:link.external uri="{donation.url}" rel="sponsored">{donation.name}</f:link.external>
                                 </f:then>
                                 <f:else>
                                     {donation.name}