Fix admin broadcast color form

app/assets/javascripts/pages/admin/admin.js

@@ -25,7 +25,7 @@ export default function adminInit() {
 
   $('body').on('click', '.js-toggle-colors-link', (e) => {
     e.preventDefault();
-    $('.js-toggle-colors-container').toggleClass('hidden');
+    $('.js-toggle-colors-container').toggleClass('hide');
   });
 
   $('.log-tabs a').on('click', function logTabsClick(e) {

app/assets/stylesheets/bootstrap_migration.scss

@@ -46,6 +46,12 @@ a {
   text-align: right;
 }
 
+.form-control,
+.search form {
+  // Bootstrap 4 does not have a height
+  height: 34px;
+}
+
 table {
   // Remove any table border lines
   border-spacing: 0;