Make form editor modals wider

[MAILPOET-1565]

assets/js/src/form_editor/form_editor.js

@@ -1137,6 +1137,7 @@ WysijaForm.Widget = window.Class.create(WysijaForm.Block, {
       title: window.MailPoet.I18n.t('editFieldSettings'),
       template: window.jQuery('#form_template_field_settings').html(),
       data: this.getData(),
+      minWidth: '500px',
       onSuccess: function () {
         var data = window.jQuery('#form_field_settings').mailpoetSerializeObject();
         this.redraw(data);

assets/js/src/modal.js

@@ -320,6 +320,9 @@ define('modal', ['mailpoet', 'jquery'],
             jQuery('#mailpoet_popup_wrapper').css({
               height: this.options.height
             });
+            if (this.options.minWidth) {
+              jQuery('#mailpoet_popup').css({ minWidth: this.options.minWidth });
+            }
             break;
           case 'panel':
             // set dimensions