webgui: apply clang format for the CEF and Qt5 code

gui/canvaspainter/v7/cef/cef_main.cxx

gui/canvaspainter/v7/cef/simple_app.cxx

gui/canvaspainter/v7/cef/simple_app.h

gui/canvaspainter/v7/cef/simple_handler.cxx

gui/canvaspainter/v7/cef/simple_handler.h

gui/canvaspainter/v7/cef/simple_handler_linux.cxx

gui/canvaspainter/v7/qt5/rootqt5.cpp

gui/canvaspainter/v7/qt5/rootwebpage.cpp

gui/canvaspainter/v7/qt5/rootwebpage.h

gui/canvaspainter/v7/qt5/rootwebview.cpp

gui/canvaspainter/v7/qt5/rootwebview.h