fix(popup): pre-existing popup positioning inside tables

Behaviour of jQuery.position has issue from jQuery v3.3.0.
This PR updated positioning logic to work regardless of jQuery versions.

Author: exoego

src/definitions/modules/popup.js

@@ -510,9 +510,10 @@ $.fn.popup = function(parameters) {
               $popupOffsetParent = module.get.offsetParent($popup),
               targetElement      = $target[0],
               isWindow           = ($boundary[0] == window),
-              targetPosition     = (settings.inline || (settings.popup && settings.movePopup))
-                ? $target.position()
-                : $target.offset(),
+              targetOffset       = $target.offset(),
+              parentOffset       = settings.inline || (settings.popup && settings.movePopup)
+                ? $target.offsetParent().offset()
+                : { top: 0, left: 0 },
               screenPosition = (isWindow)
                 ? { top: 0, left: 0 }
                 : $boundary.offset(),
@@ -528,8 +529,8 @@ $.fn.popup = function(parameters) {
                 element : $target[0],
                 width   : $target.outerWidth(),
                 height  : $target.outerHeight(),
-                top     : targetPosition.top,
-                left    : targetPosition.left,
+                top     : targetOffset.top - parentOffset.top,
+                left    : targetOffset.left - parentOffset.left,
                 margin  : {}
               },
               // popup itself