EZP-30967: Fix notification modal from user menu (#1093)

Author: tischsoic

src/bundle/Resources/public/scss/_user-menu.scss

@@ -67,8 +67,6 @@
             box-shadow: 0 calculateRem(6px) calculateRem(6px) 0 rgba(51, 51, 51, 0.3);
             transform-origin: top center;
             white-space: nowrap;
-            background-clip: content-box;
-            z-index: -1;
 
             &--hidden {
                 padding-top: 0;