Updated display properties dialog to ensure valid mode selection and provide more descriptive error messages.
Updated display properties dialog to ensure valid mode selection and provide more descriptive error messages.


git-svn-id: 5afc437a751a4ff2ced778146f5faadda0b504ab@1314 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

chototsu/MikuMikuStudio,chototsu/MikuMikuStudio,chototsu/MikuMikuStudio,chototsu/MikuMikuStudio