Remove prop remapping in select component

[x8lucas8x]

When we migrated to react-select v2 a remapping of some props was put in place in order to minimise the scope of changes in another projects. It's part of the team consensus that this is causing confusion though. Therefore we should get rid of multi, clearable, creatable and disabled props and favour isMulti, isClearable, isCreatable and isDisabled props instead.