* Small enhancements in SdbWidget class.
Destructors of child classes should be marked with the `override` keyword. Also since Qt's
widgets aren't movable or copyable, we can explicitly let the compiler know with the `Q_DISABLE_COPY_MOVE`
macro.
* Define Q_DISABLE_COPY_MOVE macro for versions < 5.13.0 in SdbWidget
Sometimes it is not necessary to include the whole Cutter.h file
Hence, it's been splitted so you can include only what you require
E.g. #include "core/CutterCommon.h" to have access to the common types
