Fixed arrow issue

src/web/stylesheets/utils/_overrides.css

@@ -140,10 +140,12 @@ optgroup {
 .popover {
     background-color: var(--popover-background);
     border-color: var(--popover-border-colour);
-    max-height: 100%;
-    overflow-y: auto;
 }
 
+.popover-content {
+    max-height: 90vh;
+    overflow-y: auto;
+}
 
 .popover.right>.arrow {
     border-right-color: var(--popover-border-colour);