bug#7787: 23.2; wrong meaning for mouse-2 while in search mode

[Juri Linkov]

>> I have no preference about whether clicking on the buffer should yank
>> to the search string.  Maybe some users expect that it should exit Isearch?
>> But in any case I think it should not depend on mouse-yank-at-point.
>
> But that's what mouse-yank-at-point controls in other contexts --
> whether the paste is going where the mouse cursor is, or whether it's
> going where you're typing.

How this is related to deciding whether clicking anywhere in the buffer
should paste to the echo area with the search message?