TYPO3 Core

There is a display glitch for using drag-n-drop with EXT:container - see https://github.com/b13/container/issues/490

This is fixable by removing an unnecessary position: relative in the core.

.t3-page-ce {
    position: relative;
}

There are no child elements inside .t3-page-ce that use position: absolute.
The element .t3-page-ce has none of the properties top, right, bottom, left or z-index.
So position: relative can be omitted resulting in the default position: static.

Introduced by [TASK] Do not use jQuery and jQuery UI in page module drag&drop