-Update from WebTranslator v3.0:
latin - 9 changes by Supercheese


git-svn-id: http://svn.openttd.org/trunk@27083 6aa0318a-3be1-0310-93fa-89fd2396df07
-Doc: Improve documentation of AllocateWindowDescFront.


git-svn-id: http://svn.openttd.org/trunk@27084 6aa0318a-3be1-0310-93fa-89fd2396df07
-Fix: Always return a valid window to the world generation gui code.


git-svn-id: http://svn.openttd.org/trunk@27085 6aa0318a-3be1-0310-93fa-89fd2396df07
-Codechange: Simplify opening of windows by always returning a valid window pointer.


git-svn-id: http://svn.openttd.org/trunk@27086 6aa0318a-3be1-0310-93fa-89fd2396df07
-Fix (r26864): the shadow bit of disaster vehicles got cleared after being set to show a shadow


git-svn-id: http://svn.openttd.org/trunk@27087 6aa0318a-3be1-0310-93fa-89fd2396df07
-Update from WebTranslator v3.0:
irish - 20 changes by tem


git-svn-id: http://svn.openttd.org/trunk@27088 6aa0318a-3be1-0310-93fa-89fd2396df07