Disabled button pointer event

[TAYTS]

May I propose to change the pointer-events to auto for disabled button so that the the cursor: not-allowed will be shown to indicate the disabled button state?

eui/src/components/button/_button.scss

Lines 39 to 43 in 34e187f

	@include euiButtonContentDisabled;
	color: $euiButtonColorDisabledText;
	border-color: $euiButtonColorDisabled;
	pointer-events: none;

[cchaos]

Looks like this was a recent regression caused by the creation of the euiButtonContentDisabled() mixin that comes before the pointer-events: none. b02b840#diff-c9c0736fdff5dd43acc1168076e8a319

But I think in the above snippet, line 43 can just be removed entirely.

[TAYTS]

@cchaos I have submitted the PR to remove the pointer-events: none