help echo (tooltip) for :link buttons in Customize

[Drew Adams]

The tooltip for a :link button in Customize says only this: "Follow link".

1. This is useless - we might as well get rid of it, if we can't find
   something better.

2. It is a button, not a link (from a user's perspective), so the text
   is anyway incorrect.

3. If we keep such a tooltip, the text should be more specific, taking
   into account the particular kind of :link. For example, for
   `(url-link...)' we might use "Information on the Web" or "Find on
   the Web"; for `(emacs-commentary-link...)' we might use
   "Commentary" or "Library Commentary".

4. If an associated :tag is available, we might use that as the help
   echo too - e.g. :tag "Download" could lead to a help echo with the
   same text; however, in this case, the help echo is truly
   unnecessary and unhelpful.


In GNU Emacs 22.0.50.1 (i386-mingw-nt5.1.2600)
 of 2005-06-26 on NONIQPC
X server distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc
(3.3) --cflags -I../../jpeg-6b-3/include -I../../libpng-1.2.8/include -I../.
./tiff-3.6.1-2/include -I../../xpm-nox-4.2.0/include -I../../zlib-1.2.2/incl
ude'