simplifications thanks to refreshRendering() auto-chaining
temporarily comment out ios and holodark theme, fixes #149
Remove uses of dojo/dom-geometry.

Use Element.getBoundingClientRect() instead of domGeometry.position().
Also created place.position() method to get document position rather than viewport position.

Also, leverage border-box CSS setting so we can stop using domGeometry.setMarginBox().

Note that place.around() no longer takes an id, only a node.