chore(*): Fix active-item-color to icon-selected-color of bottom nav theme

Author: dkamburov

src/app/layouts/tabbar/tabbar-style/tabbar-style.component.scss

@@ -24,7 +24,7 @@ igx-bottom-nav-content {
 
 $dark-bottom-nav: bottom-nav-theme(
     $background: #292826,
-    $active-item-color: #F4D45C
+    $icon-selected-color: #F4D45C
 );
 
 // :host {