Show drag cursor on all window lines (mode, tab, header)

Show drag cursor on all window lines (mode, tab, header)

* lisp/ruler-mode.el (ruler-mode-map): Remove down-mouse-1
binding that conflicts with dragging header line.
* src/xdisp.c (note_mode_line_or_margin_highlight): Renamed
to...
(note_line_or_margin_highlight): ...new name since it applies to
any window line (mode, tab, header).  Set drag cursor for window
top lines.
(note_mouse_highlight): Update call to new name (bug#76084).

(cherry picked from commit 8528249ee29b243772de48c7c44d07744adb3afc)