widget-move-and-invoke

[martin rudalics]

When in a customization buffer I mouse-click on a "Show Value" or "More"
button and point is somewhere in the lower part of the window, chances
are that Emacs recenters the window.  As a consequence, the text I want
to view may end up before `window-start' and the mouse cursor appear at
a completely unrelated position.  That's annoying.

Emacs 21 did bind down-mouse-1 to `Custom-move-and-invoke'.  In 2005 the
latter was replaced by `widget-move-and-invoke' and in 2006 by
`widget-button-click'.  Are there any good reasons for this regression?