jquery-ui works now with touch devices

- the "old" implementation at wekan source code didn't work anymore with
  jquery-ui@1.13.0, so it's necessary to use another package to get it
  work again

client/lib/utils.js

@@ -364,67 +364,6 @@ Utils = {
     };
   },
 
-  // Detect touch device
-  isTouchDevice() {
-    const isTouchable = (() => {
-      const prefixes = ' -webkit- -moz- -o- -ms- '.split(' ');
-      const mq = function(query) {
-        return window.matchMedia(query).matches;
-      };
-
-      if (
-        'ontouchstart' in window ||
-        (window.DocumentTouch && document instanceof window.DocumentTouch)
-      ) {
-        return true;
-      }
-
-      // include the 'heartz' as a way to have a non matching MQ to help terminate the join
-      // https://git.io/vznFH
-      const query = [
-        '(',
-        prefixes.join('touch-enabled),('),
-        'heartz',
-        ')',
-      ].join('');
-      return mq(query);
-    })();
-    Utils.isTouchDevice = () => isTouchable;
-    return isTouchable;
-  },
-
-  calculateTouchDistance(touchA, touchB) {
-    return Math.sqrt(
-      Math.pow(touchA.screenX - touchB.screenX, 2) +
-        Math.pow(touchA.screenY - touchB.screenY, 2),
-    );
-  },
-
-  enableClickOnTouch(selector) {
-    let touchStart = null;
-    let lastTouch = null;
-
-    $(document).on('touchstart', selector, function(e) {
-      touchStart = e.originalEvent.touches[0];
-    });
-    $(document).on('touchmove', selector, function(e) {
-      const touches = e.originalEvent.touches;
-      lastTouch = touches[touches.length - 1];
-    });
-    $(document).on('touchend', selector, function(e) {
-      if (
-        touchStart &&
-        lastTouch &&
-        Utils.calculateTouchDistance(touchStart, lastTouch) <= 20
-      ) {
-        e.preventDefault();
-        const clickEvent = document.createEvent('MouseEvents');
-        clickEvent.initEvent('click', true, true);
-        e.target.dispatchEvent(clickEvent);
-      }
-    });
-  },
-
   manageCustomUI() {
     Meteor.call('getCustomUI', (err, data) => {
       if (err && err.error[0] === 'var-not-exist') {