bug#49626: Why mouse-1 is not allowed on button links?

[Juri Linkov <juri@linkov.net>]

Tried to click mouse-1 on the button links in the 'dictionary' buffers
(from the built-in package lisp/net/dictionary.el),
but it does nothing, unlike mouse-2.  Should this patch be applied?
I'm asking because I'm not sure about its side effects to other packages.

diff --git a/lisp/button.el b/lisp/button.el
index 69d70540c0..74dfb5d541 100644
--- a/lisp/button.el
+++ b/lisp/button.el
@@ -61,6 +61,7 @@ button-map
     ;; might get converted to ^M when building loaddefs.el
     (define-key map [(control ?m)] 'push-button)
     (define-key map [mouse-2] 'push-button)
+    (define-key map [follow-link] 'mouse-face)
     ;; FIXME: You'd think that for keymaps coming from text-properties on the
     ;; mode-line or header-line, the `mode-line' or `header-line' prefix
     ;; shouldn't be necessary!