Asset sort order: algorithm for sorting appears exponentially slower with more assets and bundles

[DominicWatson]

From @madmike_de:

Did some debugging. I have 8 stickerbundle.cfc files (including the extensions) with all over 194 assets. With 193 assets the sticker function calculateOrder loops about 55000 times. Adding one assets let the loop run more than 1 million times! (I exit the loop after 1mio). What I see is, that the following loop:

for( var i = 1; i < keyCount; i++ ){
  for( var n=i+1; n <= keyCount; n++ ){
    ...
  }
}

[zspitzer]

yeah this is basically the same as #13