Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12889] Fix multiple select lists
  [ticket/13082] Repair fix
  [ticket/13082] Join classes
  [ticket/13082] move style to css file
  [ticket/13082] Replace float by text-align

phpBB/styles/prosilver/theme/forms.css

@@ -129,6 +129,10 @@ dd select {
 	width: auto;
 }
 
+dd select[multiple] {
+	width: 100%;
+}
+
 dd textarea {
 	width: 85%;
 }