add key modifiers to button event

common/utils/T/tracer/gui/container.c

common/utils/T/tracer/gui/gui.h

common/utils/T/tracer/gui/gui_defs.h

common/utils/T/tracer/gui/label.c

common/utils/T/tracer/gui/positioner.c

common/utils/T/tracer/gui/textlist.c

common/utils/T/tracer/gui/timeline.c

common/utils/T/tracer/gui/toplevel_window.c

common/utils/T/tracer/gui/widget.c

common/utils/T/tracer/gui/x.c