PLT-6486 Add an `@username` button to the profile popover, that puts the username in the post when clicked (#6349)

* PLT-6486 Add an `@username` button to the profile popover, that puts the username in the post when clicked

* PLT-6486 Display `@username` mention on the right text area on center or RHS.

* Disable @mentions from profile popover on searches, mentions and pinned posts. Fix js errors.

* Control undefined post in SearchStore that causes an exception.

1 files changed, 1 insertions, 1 deletions

diff --git a/webapp/stores/search_store.jsx b/webapp/stores/search_store.jsx
index 5dfea6867..d57c630cb 100644
--- a/webapp/stores/search_store.jsx
+++ b/webapp/stores/search_store.jsx
@@ -122,7 +122,7 @@ class SearchStoreClass extends EventEmitter {
 
     updatePost(post) {
         const results = this.getSearchResults();
-        if (results == null) {
+        if (!post || results == null) {
             return;
         }