FIX: Build correct assign tag links when using subfolders (#420)

The tag links added to the topic header extras aren't aware of
subfolder usage. This change fixes that.

assets/javascripts/discourse-assign/initializers/extend-for-assigns.js

@@ -641,7 +641,7 @@ function initialize(api) {
           const tagName = params.tagName || "a";
           const href =
             tagName === "a"
-              ? `href="${assignedPath}" data-auto-route="true"`
+              ? `href="${getURL(assignedPath)}" data-auto-route="true"`
               : "";
           return `<${tagName} class="assigned-to discourse-tag simple" ${href}>
         ${icon}