Fixed dropdown search field height in ie11

Closes #19684

app/assets/stylesheets/framework/dropdowns.scss

@@ -350,6 +350,7 @@
 
 .dropdown-input-field, .default-dropdown-input {
   width: 100%;
+  min-height: 30px;
   padding: 0 7px;
   color: $dropdown-input-color;
   line-height: 30px;