Contact List: Fix Add button overflow (#1976)

src/components/left/main/ContactList.tsx

@@ -88,6 +88,7 @@ const ContactList: FC<OwnProps & StateProps> = ({
         <Loading key="loading" />
       )}
       <FloatingActionButton
+        key="create-new-contact"
         isShown
         onClick={openNewContactDialog}
         ariaLabel={lang('CreateNewContact')}

src/components/ui/FloatingActionButton.scss

@@ -4,6 +4,7 @@
   bottom: 1rem;
   transform: translateY(calc(5rem - var(--call-header-height, 0rem)));
   transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
+  z-index: 1;
 
   body.animation-level-0 & {
     transition: none !important;