[Security] Fix cell expansion popover actions

- EUI added 2 `.euiPopoverFooter`s for overflowing cell actions, and Security's CSS to hide the first 2 cell actions (replaced by their own custom cell actions) was unintentionally affecting other actions

x-pack/plugins/security_solution/public/common/components/page/index.tsx

@@ -75,17 +75,17 @@ export const AppGlobalStyle = createGlobalStyle<{ theme: { eui: { euiColorPrimar
 
     .euiPopoverFooter {
       border: 0;
+      margin-top: 0 !important;
       .euiFlexGroup {
         flex-direction: column;
+      }
+    }
 
-        .euiButtonEmpty .euiButtonContent {
-          justify-content: left;
-        }
-
-        .euiFlexItem:first-child,
-        .euiFlexItem:nth-child(2) {
-            display: none;
-        }
+    // Hide EUI's 'Filter in' and 'Filter out' footer buttons - replaced with our own buttons
+    .euiPopoverFooter:nth-child(2) {
+      .euiFlexItem:first-child,
+      .euiFlexItem:nth-child(2) {
+          display: none;
       }
     }
   }