Merge pull request #134 from nextcloud/textPreviewSelectable

textPreview is selectable

res/layout/text_file_preview.xml

@@ -29,5 +29,6 @@
         android:layout_marginLeft="8dp"
         android:layout_marginRight="8dp"
         android:layout_marginStart="8dp"
+        android:textIsSelectable="true"
         android:visibility="gone"/>
 </ScrollView>