Fix some CSS issues (#7543)

Author: eliandoran

apps/client/src/stylesheets/style.css

@@ -2034,9 +2034,9 @@ body.zen #right-pane,
 body.zen #mobile-sidebar-wrapper,
 body.zen .tab-row-container,
 body.zen .tab-row-widget,
-body.zen .ribbon-container:not(:has(.classic-toolbar-widget.visible)),
-body.zen .ribbon-container:has(.classic-toolbar-widget.visible) .ribbon-top-row,
-body.zen .ribbon-container .ribbon-body:not(:has(.classic-toolbar-widget.visible)),
+body.zen .ribbon-container:not(:has(.classic-toolbar-widget)),
+body.zen .ribbon-container:has(.classic-toolbar-widget) .ribbon-top-row,
+body.zen .ribbon-container .ribbon-body:not(:has(.classic-toolbar-widget)),
 body.zen .note-icon-widget,
 body.zen .title-row .icon-action,
 body.zen .floating-buttons-children > *:not(.bx-edit-alt),

apps/client/src/widgets/ribbon/style.css

@@ -264,7 +264,6 @@
     position: absolute;
     inset-inline-end: 5px;
     bottom: 5px;
-    z-index: 1000;
 }
 
 .style-resolver {