[CMake] adding and removing build configuration types

[ElderOrb]

>> CMake Error: Invalid configuration type in CMAKE_CONFIGURATION_TYPES:
>> Debug_Unic
>> ode (Valid types are Debug,Release,MinSizeRel,RelWithDebInfo)
>> CMake Error: Invalid configuration type in CMAKE_CONFIGURATION_TYPES:
>> Release_Un
>> icode (Valid types are Debug,Release,MinSizeRel,RelWithDebInfo)
>>
>> Where I wrong now ?
>>

crco> Nothing. This works only with makefile generators: NMake, MSYS, Unix.
crco> It is very sad, but it seems, that generator for MSVS not support adding
crco> custom configurations. :(

Really very sad. And it seems it is a bug. Maybe with some changes in
cmake code it will work. Anyway, thank you for help!