fix(dom utils): use getBoundingClientRect() to determine element visibility (#1203)
fix(dom utils): use getBoundingClientRect() to determine element visibility (#1203)

`Element.offsetParent`/`offsetHeight`/`offsetWidth` does not work on `<svg>` elements.

Swtching to `Element.getBoundingClientRect().height` and `.width` gets around this limitation
sschadwick/bootstrap-vue,bootstrap-vue/bootstrap-vue,sschadwick/bootstrap-vue,tmorehouse/bootstrap-vue,bootstrap-vue/bootstrap-vue,sschadwick/bootstrap-vue,tmorehouse/bootstrap-vue