feat(dropdown): support icon groups margin

icon groups were not respected to add the same margins inside dropdown menus as for single icons

Author: lubber-de

src/definitions/modules/dropdown.less

@@ -267,13 +267,15 @@
 ---------------*/
 
 /* Icons / Flags / Labels / Image */
+.ui.dropdown > .text > i.icons,
 .ui.dropdown > .text > i.icon,
 .ui.dropdown > .text > .label,
 .ui.dropdown > .text > .flag,
 .ui.dropdown > .text > img,
 .ui.dropdown > .text > .image {
   margin-top: @textLineHeightOffset;
 }
+.ui.dropdown .menu > .item > i.icons,
 .ui.dropdown .menu > .item > i.icon,
 .ui.dropdown .menu > .item > .label,
 .ui.dropdown .menu > .item > .flag,
@@ -282,11 +284,13 @@
   margin-top: @itemLineHeightOffset;
 }
 
+.ui.dropdown > .text > i.icons,
 .ui.dropdown > .text > i.icon,
 .ui.dropdown > .text > .label,
 .ui.dropdown > .text > .flag,
 .ui.dropdown > .text > img,
 .ui.dropdown > .text > .image,
+.ui.dropdown .menu > .item > i.icons,
 .ui.dropdown .menu > .item > i.icon,
 .ui.dropdown .menu > .item > .label,
 .ui.dropdown .menu > .item > .flag,