Close #3476

Upgraded theme minimum versions, containing fixes for a "bug" where the container was a couple px too large due to a missing class.

package.json

@@ -49,8 +49,8 @@
     "nodebb-plugin-spam-be-gone": "0.4.1",
     "nodebb-rewards-essentials": "0.0.3",
     "nodebb-theme-lavender": "1.0.52",
-    "nodebb-theme-persona": "2.0.19",
-    "nodebb-theme-vanilla": "3.0.11",
+    "nodebb-theme-persona": "2.0.20",
+    "nodebb-theme-vanilla": "3.0.12",
     "nodebb-widget-essentials": "1.0.5",
     "npm": "^2.1.4",
     "passport": "^0.2.1",