Method InputTextEx

Edit a string of text - buf_size account for the zero-terminator, so a buf_size of 6 can hold "Hello" but not "Hello!". This is so we can easily call InputText() on static arrays using ARRAYSIZE() and to match Note that in std::string world, capacity() would omit 1 byte used by the zero-terminator. - When active, hold on a privately held copy of the text (and apply back to 'buf'). So changing 'buf