Adds #1429, dropdown menu left/right position

src/definitions/modules/dropdown.less

@@ -40,7 +40,7 @@
 *******************************/
 
 /*--------------
-     Menu
+      Menu
 ---------------*/
 
 .ui.dropdown .menu {
@@ -689,6 +689,28 @@ select.ui.dropdown {
 }
 
 
+/* Default Side (Right) */
+.ui.dropdown .right.menu > .menu,
+.ui.dropdown .menu .right.menu {
+  left: 100% !important;
+  right: auto !important;
+}
+
+/* Left Flyout Menu */
+.ui.dropdown > .left.menu .menu,
+.ui.dropdown .menu .left.menu {
+  left: auto !important;
+  right: 100% !important;
+}
+
+.ui.dropdown .item .left.dropdown.icon,
+.ui.dropdown .left.menu .item .dropdown.icon {
+  width: auto;
+  float: @leftMenuDropdownIconFloat;
+  margin: @leftMenuDropdownIconMargin;
+}
+
+
 /*--------------
      Simple
 ---------------*/

src/themes/default/modules/dropdown.overrides

@@ -36,6 +36,11 @@
   content: '\f0da'/*rtl:'\f0d9'*/;
 }
 
+.ui.dropdown .item .left.dropdown.icon:before,
+.ui.dropdown .left.menu .item .dropdown.icon:before {
+  content: "\f0d9"/*rtl:"\f0da"*/;
+}
+
 /* Vertical Menu Dropdown */
 .ui.vertical.menu .dropdown.item > .dropdown.icon:before {
   content: "\f0da"/*rtl:"\f0d9"*/;

src/themes/default/modules/dropdown.variables

@@ -217,6 +217,10 @@
       Variations
 --------------------*/
 
+/* Flyout Direction */
+@leftMenuDropdownIconFloat: left;
+@leftMenuDropdownIconMargin: @itemLineHeightOffset @itemElementDistance 0em 0em;
+
 /* Simple */
 @simpleTransitionDuration: 0.2s;
 @simpleTransition: opacity @simpleTransitionDuration @defaultEasing;