Notebook Text Cell Highlight Improvements (#12197)

* 1st iteration

* works but multiple highlights

* remove comment

* Works but multiple selects

* wip

* cleanup

* cleanup

* Update TPN

* Add mark.js to remote + web

* PR feedback

* Tweak workbench html files

.eslintrc.json

@@ -731,7 +731,8 @@
 					"chart.js",
 					"plotly.js-dist-min",
 					"angular2-grid",
-					"html-query-plan"
+					"html-query-plan",
+					"mark.js"
                 ]
             },
             {