FIX: uses same style for mobile PMs than desktop

FIX: uses same style for mobile PMs than desktop

diff --git a/assets/javascripts/discourse-assign/initializers/extend-for-assigns.js.es6 b/assets/javascripts/discourse-assign/initializers/extend-for-assigns.js.es6
index f3514e6..7d31365 100644
--- a/assets/javascripts/discourse-assign/initializers/extend-for-assigns.js.es6
+++ b/assets/javascripts/discourse-assign/initializers/extend-for-assigns.js.es6
@@ -38,7 +38,7 @@ function registerTopicFooterButtons(api) {
       if (user) {
         const label = I18n.t("discourse_assign.unassign.title");
 
-        if (this.site.mobileView) {
+        if (this.site.mobileView && !this.get("topic.isPrivateMessage")) {
           return htmlSafe(
             `<span class="unassign-label"><span class="text">${label}</span><span class="username">${
               user.username

GitHub sha: 3df853f5