Fix dropdown keyboard selection styles inside menu

src/definitions/collections/menu.less

@@ -255,6 +255,10 @@
   background: @dropdownHoveredItemBackground !important;
   color: @dropdownHoveredItemColor !important;
 }
+.ui.menu .ui.dropdown .menu > .selected.item {
+  background: @dropdownSelectedItemBackground !important;
+  color: @dropdownSelectedItemColor !important;
+}
 .ui.menu .ui.dropdown .menu > .active.item {
   background: @dropdownActiveItemBackground !important;
   font-weight: @dropdownActiveItemFontWeight !important;
@@ -1317,7 +1321,7 @@ Floated Menu / Item
 
 
 /*--------------
- Inverted Colors
+    Inverted
 ---------------*/
 
 /*--- Inverted Colors  ---*/

src/themes/default/collections/menu.variables

@@ -183,8 +183,12 @@
 @activeHoverItemBackground: @transparentBlack;
 @activeHoverItemColor: @selectedTextColor;
 
+/* Selected Dropdown */
+@dropdownSelectedItemBackground: @transparentBlack;
+@dropdownSelectedItemColor: @selectedTextColor;
+
 /* Active Dropdown */
-@dropdownActiveItemBackground: @transparentBlack;
+@dropdownActiveItemBackground: @subtleTransparentBlack;
 @dropdownActiveItemColor: @selectedTextColor;
 @dropdownActiveItemFontWeight: bold;