FIX: tooltip regression in admin dashboard

- adds registerHoverTooltip in tooltip qunit test

app/assets/javascripts/discourse/lib/tooltip.js.es6

@@ -3,8 +3,9 @@ import { escapeExpression } from "discourse/lib/utilities";
 const fadeSpeed = 300;
 const tooltipID = "#discourse-tooltip";
 
-export function showTooltip($this) {
-  const $parent = $this.offsetParent();
+export function showTooltip(e) {
+  const $this = $(e.currentTarget),
+    $parent = $this.offsetParent();
   // html tooltip are risky try your best to sanitize anything
   // displayed as html to avoid XSS attacks
   const content = $this.attr("data-tooltip")
@@ -77,9 +78,7 @@ export function hideTooltip() {
 
 export function registerTooltip(jqueryContext) {
   if (jqueryContext.length) {
-    jqueryContext
-      .off("click")
-      .on("click", event => showTooltip($(event.currentTarget)));
+    jqueryContext.off("click").on("click", event => showTooltip(event));
   }
 }
 

test/javascripts/lib/tooltip-test.js.es6

@@ -1,4 +1,4 @@
-import { registerTooltip } from "discourse/lib/tooltip";
+import { registerTooltip, registerHoverTooltip } from "discourse/lib/tooltip";
 
 // prettier-ignore
 QUnit.module("lib:tooltip", {
@@ -37,7 +37,7 @@ QUnit.test("text support", async assert => {
 
 QUnit.test("html support", async assert => {
   const $testHtmlLink = fixture(".test-html-link");
-  registerTooltip($testHtmlLink);
+  registerHoverTooltip($testHtmlLink);
 
   await $testHtmlLink.click();