fix(gesture): don't stop hijacking clicks on ios & android when jquer…

…y is loaded

Remove window.jQuery from check for hijacking clicks on mobile devices.
Touch clicks were emitted twice when jQuery was loaded which made checkboxes and buttons unusable on mobile devices.

Addressing Issue #1842 Utilizing proposed fix

Closes #1869, #1842.

src/core/services/gesture/gesture.js

@@ -24,7 +24,7 @@ if (shouldHijackClicks) {
   document.addEventListener('click', function(ev) {
     // Space/enter on a button, and submit events, can send clicks
     var isKeyClick = ev.clientX === 0 && ev.clientY === 0;
-    if (window.jQuery || isKeyClick || ev.$material) return;
+    if (isKeyClick || ev.$material) return;
 
     // Prevent clicks unless they're sent by material
     ev.preventDefault();