fix(extension-link): Click handler opens selected link instead of clicked link

[jmtaber129]

Description

Fixes a bug in which under certain conditions where multiple links are present, clicking one link will instead open a different link. Specifically, when the editor state shows one link as selected, clicking a different link will open the "selected" link instead.

See also ParabolInc/parabol#7524 where this issue was initially reported for our web app.

Repro

The specific conditions in which editor state does not reflect the clicked link are:

• openOnClick is true
• Content is read-only - editable is false

As such, I recommend reviewers test with the following patch applied:

diff --git a/demos/src/Marks/Link/React/index.jsx b/demos/src/Marks/Link/React/index.jsx
index 53b3134a9..4cfb9b4f3 100644
--- a/demos/src/Marks/Link/React/index.jsx
+++ b/demos/src/Marks/Link/React/index.jsx
@@ -16,7 +16,7 @@ export default () => {
       Text,
       Code,
       Link.configure({
-        openOnClick: false,
+        openOnClick: true,
       }),
     ],
     content: `
@@ -27,6 +27,8 @@ export default () => {
           By default every link will get a <code>rel="noopener noreferrer nofollow"</code> attribute. It’s configurable though.
         </p>
       `,
+
+    editable: false,
   })
 
   const setLink = useCallback(() => {

With this patch applied, you can reproduce locally with the following steps:

• Navigate to /preview/Marks/Link
• Cmd+click "world wide web" (opens https://en.wikipedia.org/wiki/World_Wide_Web)
• Cmd+click "another one" (also opens https://en.wikipedia.org/wiki/World_Wide_Web instead of https://statamic.com/)

After applying the changes in this PR, the Cmd+click on "another one" will open the correct link, https://statamic.com/

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[jmtaber129]

@bdbch mind taking a look at this small bugfix when you have a chance? This is causing a P2 bug over in https://github.com/ParabolInc/parabol (ParabolInc/parabol#7524). Thanks!

[bdbch]

@jmtaber129 sorry for the wait. Looking into it right now!

[bdbch]

LGTM