bug#11233: 24.1.50; Wishlist: dired mouse-2 other window behavior

[martin rudalics]

> I suggest to use the same modifiers as used in web browsers:
> mouse-1 opens in the same window, C-mouse-1 opens in other window
> (not selected), C-S-mouse-1 opens in other window (and selected),

Does this mean the buffer would appear in two windows?  On Firefox
C-S-mouse-1 behaves just as C-mouse-1 here.

> S-mouse-1 opens in other frame.

Would we decode this in `find-file' or `dired-find-file'?  IIUC we'd
have to check

(a) whether the mouse was used at all and, if so, which modifier was
    applied,

(b) whether the mouse was over a text with a this-window / other-window
    / other-frame interpretation, and

(c) what any user customizations wrt prefix key and modifiers are in the
    present context.

`push-button' and `button-activate' do something related.  Could we
interact with these functions?

martin