message: Add headers for mouse and key events being used
diff: #include "ShaderViewer.h"
  #include <QFontDatabase>
  #include <QHBoxLayout>
  +#include <QKeyEvent>
  #include <QListWidget>
  #include <QMenu>
  +#include <QMouseEvent>
  #include <QShortcut>
  #include <QToolTip>
  #include "3rdparty/scintilla/include/SciLexer.h"
  