[GREENFOOT-423] Narrow Worlds do not display correctly on greenfoot.org site

Narrow Worlds do not display correctly on greenfoot.org site. Eg this scenario:

http://www.greenfoot.org/scenarios/14846

World width is 300, but the size of the applet is increased to accommodate the control buttons. The world should be centered in the available space with everything outside the world a flat gray. Instead objects that cross the world boundary are painted completely, and the world is left-justified within the space it occupies.

Issue metadata

Issue type: Bug
Priority: Low