Switch to linkify-react for element Linkification as it handles React subtrees without exploding (#10060

* Switch to linkify-react instead of our faulty implementation

Fixes a series of soft crashes where errors include "The node to be removed is not a child of this node."

* Improve types

* Fix types

* Update snapshots

* Add test

* Fix test

package.json

@@ -86,6 +86,7 @@
         "jszip": "^3.7.0",
         "katex": "^0.16.0",
         "linkify-element": "4.0.0-beta.4",
+        "linkify-react": "4.0.0-beta.4",
         "linkify-string": "4.0.0-beta.4",
         "linkifyjs": "4.0.0-beta.4",
         "lodash": "^4.17.20",