Fix select styling in ConverseJS.

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Minor changes and fixes
 
 * Fix missing titles on some buttons when the chat is open.
+* Fix select styling in ConverseJS.
 
 ## 9.0.2
 

conversejs/custom/shared/styles/livechat.scss

@@ -173,4 +173,11 @@ body.converse-embedded {
   textarea:read-only {
     background-color: var(--chat-textarea-disabled-bg-color) !important;
   }
+
+  select.form-control {
+    // Peertube uses a trick to display a triangle as dropdown icon for selects.
+    // But this tricks breaks selects that are not in a .peertube-select-container.
+    // So we must revert appearance:
+    appearance: revert !important;
+  }
 }