[h-e-w] widget-validation not working properly in emacs 21.1

[Geert Ribbers]

Hi.

When on a customization screen "Set for current session" is pressed *with a
mouse* and there is an error in the variable to set then the cursor doesn't
jump to the field in error and the error-message can not be read in the
minibuffer because the "button-message" is displayed there (you can find the
message in the *messages* buffer).
The only thing you notice is that the button "doesn't seem to work".
When the button is pressed with Enter then it works all right: cursor at the
field in error, error-message in mini-buffer.
In 2071 this was working correctly still!

Example: ps-paper-type, try to set a type that doesn't exist.

Regards, Geert Ribbers