use day/night color

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

src/main/java/com/owncloud/android/ui/fragment/FileDetailSharingFragment.java

@@ -207,7 +207,7 @@ public class FileDetailSharingFragment extends Fragment implements UserListAdapt
         // todo extract
         internalLinkIcon.getBackground().setColorFilter(getResources().getColor(R.color.grey_db),
                                                         PorterDuff.Mode.SRC_IN);
-        internalLinkIcon.getDrawable().mutate().setColorFilter(getResources().getColor(R.color.black),
+        internalLinkIcon.getDrawable().mutate().setColorFilter(getResources().getColor(R.color.textColor),
                                                                PorterDuff.Mode.SRC_IN);