FIX: prevents overflow on emoji picker on mobile (#7189)

FIX: prevents overflow on emoji picker on mobile (#7189)

diff --git a/app/assets/stylesheets/mobile/emoji.scss b/app/assets/stylesheets/mobile/emoji.scss
index 3bd4ef1..233c32b 100644
--- a/app/assets/stylesheets/mobile/emoji.scss
+++ b/app/assets/stylesheets/mobile/emoji.scss
@@ -1,4 +1,8 @@
 .emoji-picker {
-  height: 250px;
+  max-height: 280px;
   border: none;
 }
+
+.emoji-picker .category-icon {
+  margin: 2px;
+}

GitHub sha: bc488c8d