fix(tooltip): ensure valid node before removal to prevent errors

This commit fixes an issue where the `removeTooltip` function attempted
to remove a tooltip element from the DOM without verifying if it was a
valid child of `document.body`. The updated implementation adds a check
to ensure the tooltip exists and its parent node is `document.body`
before proceeding with the removal. This change prevents the
"Failed to execute removeChild on Node: parameter 1 is not of type Node."
error from being thrown, enhancing the robustness and reliability of tooltip removal.

Author: Monica Wheeler

packages/sage-system/lib/tooltip.js

@@ -53,17 +53,18 @@ Sage.tooltip = (function() {
     positionTooltip(evt.target, tooltip, pos);
   }
 
-
   // Removes tooltip from DOM
   function removeTooltip(evt) {
-    if (!evt.target.hasAttribute(DATA_ATTR) || !document.querySelector(SELECTOR) || !document.querySelector(`.${TOOLTIP_CLASS}`) || !evt.target.dataset.jsTooltip)  return;
+    if (!evt.target.hasAttribute(DATA_ATTR) || !document.querySelector(SELECTOR) || !document.querySelector(`.${TOOLTIP_CLASS}`) || !evt.target.dataset.jsTooltip) return;
 
     window.requestAnimationFrame(function() {
-      document.body.removeChild(document.querySelector(`.${TOOLTIP_CLASS}`));
+        var tooltip = document.querySelector(`.${TOOLTIP_CLASS}`);
+        if (tooltip && tooltip.parentNode === document.body) { // Ensure tooltip exists and its parent is document.body before removing
+            document.body.removeChild(tooltip);
+        }
     });
   }
 
-
   // Builds list of modifier classes from array of data-attributes
   function generateClasses(ele, evt) {
     ele.dataItems.forEach(function(item) {