fix(combo): fix hover state for clear icon in disabled combo (#15405)

Author: desig9stein

projects/igniteui-angular/src/lib/core/styles/components/combo/_combo-theme.scss

@@ -310,4 +310,12 @@
             }
         }
     }
+
+    %form-group-bundle {
+        &:hover {
+            %igx-combo__clear-button {
+                color: inherit;
+            }
+        }
+    }
 }