[popover]: improve initial popover positioning by hidding, not 'removing' the element; allow to 'center' position on the x and y axis; comment out unused code
[popover]: improve initial popover positioning by hidding, not 'removing' the element; allow to 'center' position on the x and y axis; comment out unused code

ng-vcl/ng-vcl,ng-vcl/ng-vcl,ng-vcl/ng-vcl,ng-vcl/ng-vcl