Fix loading dropdown button, duplicate loading state, similar #2295. Fix search inside menu does not clear search term on select

src/definitions/modules/dropdown.js

@@ -1722,6 +1722,8 @@ $.fn.dropdown = function(parameters) {
 
         scrollPage: function(direction, $selectedItem) {
           var
+            $selectedItem = $selectedItem || module.get.selectedItem(),
+            $menu         = $selectedItem.closest(selector.menu),
             menuHeight    = $menu.outerHeight(),
             currentScroll = $menu.scrollTop(),
             itemHeight    = $item.eq(0).outerHeight(),
@@ -1735,7 +1737,6 @@ $.fn.dropdown = function(parameters) {
             $nextSelectedItem,
             elementIndex
           ;
-          $selectedItem     = $selectedItem || module.get.selectedItem();
           elementIndex      = (direction == 'up')
             ? $selectableItem.index($selectedItem) - itemsPerPage
             : $selectableItem.index($selectedItem) + itemsPerPage
@@ -2618,7 +2619,7 @@ $.fn.dropdown = function(parameters) {
         },
 
         hideAndClear: function() {
-          if(module.is.searchSelection()) {
+          if(module.has.search()) {
             module.remove.searchTerm();
             module.hide(function() {
               module.remove.filteredItem();

src/definitions/modules/dropdown.less

@@ -781,6 +781,12 @@ select.ui.dropdown {
   border-width: @loaderLineWidth;
 }
 
+/* Coupling */
+.ui.loading.dropdown.button > i.icon:before,
+.ui.loading.dropdown.button > i.icon:after {
+  display: none;
+}
+
 @keyframes dropdown-spin {
   from {
     transform: rotate(0deg);