-Fix: Scale flows only after mapping to avoid rounding errors.

git-svn-id: http://svn.openttd.org/trunk@26166 6aa0318a-3be1-0310-93fa-89fd2396df07
-Fix [FS#5834]: Certain hotkeys crashed the content GUI when the list was empty.

git-svn-id: http://svn.openttd.org/trunk@26167 6aa0318a-3be1-0310-93fa-89fd2396df07