Fixing TimberURLHelper::is_external_content
Fixing TimberURLHelper::is_external_content

TimberURLHelper::is_external_content was taking into account when WP_CONTENT folder was changed, but not when UPLOAD folder was changed.
Now it considers both.

xavivars/timber,josephbergdoll/timber,gchtr/timber,gbarberi/timber,PrisisForks/timber,rpkoller/timber,ogrosko/timber,jarednova/timber,PrisisForks/timber,ogrosko/timber,aaemnnosttv/timber,gbarberi/timber,PrisisForks/timber,rpkoller/timber,gchtr/timber,jarednova/timber,josephbergdoll/timber,aaemnnosttv/timber,Jmayhak/timber,timber/timber,Jmayhak/timber,Jmayhak/timber,josephbergdoll/timber,gchtr/timber,ogrosko/timber,aaemnnosttv/timber,xavivars/timber,rpkoller/timber,jarednova/timber,timber/timber,gbarberi/timber,xavivars/timber