refactor(list): add back selected styles after merging master

Author: simeonoff

projects/igniteui-angular/src/lib/list/list-item.component.ts

@@ -300,6 +300,7 @@ export class IgxListItemComponent implements IListChild {
      *
      * @memberof IgxListItemComponent
      */
+    @HostBinding('class.igx-list-item--selected')
     @HostBinding('class.igx-list__item-base--selected')
     @Input({ transform: booleanAttribute })
     public get selected() {

projects/igniteui-angular/src/lib/list/themes/_base.scss

@@ -244,5 +244,39 @@ $theme: $base;
                 }
             }
         }
+
+        @include m(selected) {
+            @include e(content) {
+                color: var-get($theme, 'item-text-color-selected');
+                background: var-get($theme, 'item-background-selected');
+                z-index: 3;
+            }
+
+            @include e(thumbnail) {
+                color: var-get($theme, 'item-thumbnail-color-selected');
+
+                igx-icon,
+                igc-icon {
+                    color: var-get($theme, 'item-thumbnail-color-selected');
+                }
+            }
+
+            @include e(title) {
+                color: var-get($theme, 'item-title-color-selected');
+            }
+
+            @include e(subtitle) {
+                color: var-get($theme, 'item-subtitle-color-selected');
+            }
+
+            @include e(actions) {
+                color: var-get($theme, 'item-action-color-selected');
+
+                igx-icon,
+                igc-icon {
+                    color: var-get($theme, 'item-action-color-selected');
+                }
+            }
+        }
     }
 }