another typo fixed :)
Moved platform specific UI code (MessageBox, DirectoryChooser) into osinterface.c
Merge branch 'master' of https://github.com/mzmiric5/OpenRCT2 into mzmiric5-master
Merge branch 'mzmiric5-master'
Merge branch 'os-specific' of https://github.com/atmaxinger/OpenRCT2 into atmaxinger-os-specific
Merge branch 'atmaxinger-os-specific'