Use more C++ api and constexpr. With C++ 17 we can use even more.
Change-Id: I33934cd7e087c311bf98501442df848bdb108279
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Make model manager able to select the most functional
refactoring engine from the available ones.
Change-Id: I74031c910706fd694a0a7def022531501f1ea005
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>