Resize-cursor test

Based on this DevMo page. Comparing Nightly, Safari, and Chrome ther following differences were found:

cursor: help
Nightly shows an arrow + small-? (hidpi crappy), Safari and Chrome show a large "?" cursor sans-arrow.
cursor: progress
cursor: wait
Nightly shows an arrow + spinning small-quartered-circle (roughly animated, hidpi crappy), Safari and Chrome show a starfleet-arrow + big spinning blue quartered-circle (smoothly animated)
cursor: cell
Nightly shows an pixel-thin "+", Safari and Chrome show a chunkier "+" cursor.
cursor: crosshair
Nightly/Chrome/Safari are all idential. No shadow in any, though. Just a pixel-doubled "+" with white outline in all.
cursor: vertical-text
Nightly is (hidpi crappy), Safari and Chrome show a ok cursor. Although it's worth noting that *all* are missing a white-outline to make it visible on a black background: XXXXXXXXXX (unlike the normal text cursor: XXXXXXXXXX)
cursor: move cursor: all-scroll
Nightly shows an hand (hidpi ok), Safari and Chrome show a NSEW +. Should we change this?
cursor: col-resize
cursor: row-resize
Nightly cursors are (hidpi crappy), otherwise similar to the Safari/Chrome cursors
cursor: n-resize
cursor: s-resize
cursor: e-resize
cursor: w-resize
Nightly cursors are fine, even in hidpi. Only difference with Chrome/Safari is that we use a bar+arrow, they use just an arrow. |-> vs ->
cursor: ne-resize
cursor: nw-resize
cursor: se-resize
cursor: sw-resize
Nightly cursors are (hidpi crappy), and have bar+arrow. Chrome/Safari are ok in hidpi, and have just an arrow
cursor: ew-resize
cursor: ns-resize
cursor: nesw-resize
cursor: nwse-resize
Nightly cursors are (hidpi crappy), and have bar+arrows. Chrome/Safari are ok in hidpi, and have just arrows
cursor: -prefix-zoom-in
cursor: -prefix-zoom-out
Unprefixed, these have no effect in Nightly/Safari/Chrome. Prefixed, our -moz version is (hidpi crappy)
Here's a 1x1 pixel span zoom-in-styled, to see where the offset hotspot is at:
cursor: url(..16..)


cursor: url(..32..)


cursor: url(..64..)


16x16, 32x32, and 64x64 content-specified icons. Firefox, Chrome, and Safari all look fuzzy in HiDPI mode.
-moz-grab and -moz-grabbing are both OK in Nightly/hidpi, Chrome/Safari obviously do nothing.