Revision control
++ QT += widgets core5compat
++ requires(qtConfig(filedialog))
++
++ HEADERS += mainwindow.h \
++ previewform.h \
++ encodingdialog.h
++
++ SOURCES += main.cpp \
++ mainwindow.cpp \
++ previewform.cpp \
++ encodingdialog.cpp
++
++ RESOURCES += codecs.qrc
++
++ EXAMPLE_FILES = encodedfiles
++
++ # install
++ target.path = $$[QT_INSTALL_EXAMPLES]/core5/widgets/tools/codecs
++ INSTALLS += target