Welcome message if you arrive at Streetmix looking at someone else’s street instead of new street.
Don’t show street name if welcome message is shown.
Don’t show welcome on phones.
Fix for older Firefox.
Half-solve metric holes problem.
Revert "Half-solve metric holes problem."

This reverts commit 59690f0da52e78529649e0244f533d641e72c693.
Code clean-up.
Code clean-up.
Code clean-up.
Better height for save as image.
Better error page.