Fix Emoji picker cut off at RHS (#6602)

webapp/sass/components/_emoticons.scss

@@ -103,7 +103,7 @@
 }
 
 .emoji-picker__items {
-    max-height: 262px;
+    max-height: 278px;
     overflow-x: hidden;
     overflow-y: auto;
     padding: 0px 8px 8px 8px;