mouse-1 on minor-mode lighter in mode line could bring up the minor mode's menu

["Drew Adams" <drew.adams@oracle.com>]

For consideration after the release:

Mouse-1 on a minor-mode lighter in the mode line does nothing special - it
just runs `mouse-drag-mode-line'. When a minor mode has its own menu, why
not display that for mouse-1, just as we do for major modes?

---

[Note: This is a different suggestion from what was discussed in thread
"mode-line major and minor mode help text and bindings" of 2006-04-29. The
part of that discussion that concerned minor-mode menus was about mouse-3:

> From: Richard Stallman
> Sent: Saturday, April 29, 2006 8:04 PM
>
>     6. Enhancement suggestion: It seems a bit silly to have the
>        same menu be on each of the minor-mode lighters - a waste
>        of the mouse-3 binding. Suggestion: Instead, add this
>        minor-modes menu to the major-mode menu as a submenu,
>        "Choose Minor Modes". Bonus: if the minor mode (for
>        that lighter) has, itself, a menu, that could be on mouse-3.
>
> That would be less convenient, and there is nothing else natural
> for mouse-3 to do here.
]