Revert "Fix MainMenu.xib warning; use automatic style to adapt to OS X version"
Revert "Fix MainMenu.xib warning; use automatic style to adapt to OS X version"

This reverts commit 3f0f224e19f7bb115f0bc6c95e4c630bec3dc2ff.

diwip/SpriteBuilder,diwip/SpriteBuilder,DNESS/SpriteBuilder,olegnaumenko/SpriteBuilder,diogocarneiro/SpriteBuilder,diogocarneiro/SpriteBuilder,rraallvv/SpriteBuilder,diogocarneiro/SpriteBuilder,DNESS/SpriteBuilder,spritebuilder/SpriteBuilder,rraallvv/SpriteBuilder,diogocarneiro/SpriteBuilder,DNESS/SpriteBuilder,spritebuilder/SpriteBuilder,eric-seekas/SpriteBuilder,RobertPeng/SpriteBuilder,olegnaumenko/SpriteBuilder,quicklyslow/SpriteBuilder,spritebuilder/SpriteBuilder,RobertPeng/SpriteBuilder,DNESS/SpriteBuilder,ZeusbaseGameWorkshop/SpriteBuilder,olegnaumenko/SpriteBuilder,quicklyslow/SpriteBuilder,diwip/SpriteBuilder,diwip/SpriteBuilder,ZeusbaseGameWorkshop/SpriteBuilder,quicklyslow/SpriteBuilder,diogocarneiro/SpriteBuilder,olegnaumenko/SpriteBuilder,eric-seekas/SpriteBuilder,eric-seekas/SpriteBuilder,RobertPeng/SpriteBuilder,RobertPeng/SpriteBuilder,rraallvv/SpriteBuilder,olegnaumenko/SpriteBuilder,RobertPeng/SpriteBuilder,diogocarneiro/SpriteBuilder,diwip/SpriteBuilder,ZeusbaseGameWorkshop/SpriteBuilder,ZeusbaseGameWorkshop/SpriteBuilder,ZeusbaseGameWorkshop/SpriteBuilder,spritebuilder/SpriteBuilder,rraallvv/SpriteBuilder,rraallvv/SpriteBuilder,diwip/SpriteBuilder,ZeusbaseGameWorkshop/SpriteBuilder,quicklyslow/SpriteBuilder,DNESS/SpriteBuilder,spritebuilder/SpriteBuilder,quicklyslow/SpriteBuilder,DNESS/SpriteBuilder,spritebuilder/SpriteBuilder,RobertPeng/SpriteBuilder,eric-seekas/SpriteBuilder,eric-seekas/SpriteBuilder,eric-seekas/SpriteBuilder,olegnaumenko/SpriteBuilder