TextPanel: Fixes issue when interpolation of variables stops working (#26847)

* TextPanel: Fixes issue when interpolation of variables stops working

* Tests: fixes broken typing in test

* Tests: updates e2e dashboard to html so we get the raw strings

* Tests: reverted back to markdown and fixed a bug

package.json

@@ -88,7 +88,7 @@
     "@types/jquery": "3.3.38",
     "@types/lodash": "4.14.149",
     "@types/lru-cache": "^5.1.0",
-    "@types/marked": "0.6.5",
+    "@types/marked": "1.1.0",
     "@types/moment-timezone": "0.5.13",
     "@types/mousetrap": "1.6.3",
     "@types/node": "13.7.0",
@@ -239,7 +239,7 @@
     "jsurl": "^0.1.5",
     "lodash": "4.17.19",
     "lru-cache": "^5.1.1",
-    "marked": "0.6.2",
+    "marked": "1.1.1",
     "md5": "^2.2.1",
     "memoize-one": "5.1.1",
     "moment": "2.24.0",