Fixed GPU preview negative coordinate error

			// with tab transition. This parentNode stuff instead reads the size of the tab

			// container, irrespective of WHICH tab is selected. It's nasty, but works.

			let element = this.$refs.streamDisplay.parentNode.parentNode;

			console.log(element)

			let size = [element.clientWidth, element.clientHeight];

			console.log(size)

			console.log([element.offsetWidth, element.offsetHeight])

			let elem_pos = [element.getBoundingClientRect().left, element.getBoundingClientRect().top];

			let wind_pos = [window.screenX, window.screenY];

			let navHeight = window.outerHeight - window.innerHeight;

			let position = [wind_pos[0] + elem_pos[0], wind_pos[1] + elem_pos[1] + navHeight];

			let position = [Math.max(0, wind_pos[0] + elem_pos[0]), Math.max(0, wind_pos[1] + elem_pos[1] + navHeight)];

			this.displaySize = size;

			this.displayPosition = position;