Don't add form-control class to file inputs, fix padding on .popupmenu.formcontent

skins/elastic/styles/widgets/forms.less

@@ -406,7 +406,9 @@ html.ms .propform {
 
 
 .formcontent {
+    &:not(.popupmenu) {
         padding: 1rem;
+    }
 
     .row {
         margin-right: 0; // without these the form is too wide causing horizontal scrollbar appearence

skins/elastic/ui.js

@@ -834,7 +834,7 @@ function rcube_elastic_ui()
 
         $('.toolbarmenu select', context).addClass('form-control');
         if (context != document) {
-            $('select,textarea,input:not([type="checkbox"],[type="radio"])', context).addClass('form-control');
+            $('select,textarea,input:not([type=checkbox],[type=radio],[type=file])', context).addClass('form-control');
         }
 
         // The same for some other checkboxes