Add prefixes to some window system-dependent procedures

Add prefixes to some window system-dependent procedures

* src/nsterm.m (note_mouse_movement):
* src/w32fns.c (construct_console_modifiers):
* src/w32inevt.c:
* src/w32term.c (frame_highlight, frame_unhighlight)
(construct_mouse_click, construct_mouse_wheel, construct_drag_n_drop)
(lispy_file_action, queue_notifications, note_mouse_movement):
* src/w32term.h:
* src/xterm.c (frame_highlight, frame_unhighlight)
(construct_mouse_click, note_mouse_movement, get_current_wm_state):
Add and use window system prefixes.