Smaller select for ref switcher

app/assets/stylesheets/generic/selects.scss

@@ -57,6 +57,12 @@
   max-width: 170px !important;
 }
 
-select.chosen {
-  min-width: 200px;
+select {
+  &.chosen {
+    min-width: 200px;
+  }
+
+  &.chosen-sm {
+    min-width: 100px;
+  }
 }

app/views/shared/_ref_switcher.html.haml

 = form_tag switch_project_refs_path(@project), method: :get, class: "project-refs-form" do
-  = select_tag "ref", grouped_options_refs, class: "project-refs-select chosen"
+  = select_tag "ref", grouped_options_refs, class: "project-refs-select chosen chosen-sm"
   = hidden_field_tag :destination, destination
   - if defined?(path)
     = hidden_field_tag :path, path