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
* Add TabWidget to NewFileDialog
* Project loading from NewFileDialog
* Projects dir in NewFileDialog
* Add SaveProjectDialog
* Make SaveProjectDialog work, refactor project saving and Notepad
* Add shortcut for Save
* Fix notes loading
* Sort projects in NewFileDialog
* Implement selecting projects dir in SaveProjectDialog
* Fix QAbstractButton include