Make text color of selected item themable

plugins/CoreHome/stylesheets/layout.less

@@ -265,6 +265,7 @@
 
             &.sfActive {
               .item {
+                color: @theme-color-menu-contrast-textSelected;
                 background-color: @theme-color-background-base;
                 decoration: none;
               }

plugins/ExampleTheme/stylesheets/theme.less

@@ -12,6 +12,7 @@
 
 @theme-color-menu-contrast-text:       #666666;
 @theme-color-menu-contrast-textActive: #0d0d0d;
+@theme-color-menu-contrast-textSelected: @theme-color-menu-contrast-text;
 @theme-color-menu-contrast-background: #f2f2f2;
 
 @theme-color-text:                     #0d0d0d;

plugins/Morpheus/stylesheets/theme.less

@@ -13,6 +13,7 @@
 @theme-color-base-series:              #ee3024;
 
 @theme-color-menu-contrast-text: @theme-color-text;
+@theme-color-menu-contrast-textSelected: @theme-color-menu-contrast-text;
 @theme-color-menu-contrast-textActive: @theme-color-brand;
 @theme-color-menu-contrast-background: @theme-color-background-tinyContrast;