feat: imrpvoe the css

web_src/less/_base.less

@@ -1297,10 +1297,6 @@ i.icon.centerlock {
     vertical-align: middle !important;
 }
 
-.ui.grid>.column:not(.row),
-.ui.grid>.row>.column {
-    z-index: 0,
-}
 .ui.search.action.input > input {
     width: auto;
 }