Disabled buttons inconsistent across browsers

Created by: JasperHorn

A disabled button looks partially transparent on Firefox, Chrome and IE 11 and has nothing special going on when you move the mouse over it. In IE 10 (and below, I guess) though it looks the same initially, it has an effect on mouseover: the cursor changes to not-allowed.

The culprit is in buttons.less:

.btn
{
  // [..]
  &.disabled,
  &[disabled],
  fieldset[disabled] & {
    cursor: not-allowed;
    background-color: @btn-default-color;
    pointer-events: none; // Future-proof disabling of clicks
    .opacity(.65);
    .box-shadow(none);
  }
}

IE 10 doesn't support pointer-events, so the changes that are prevented on future-proof browsers aren't on IE 10. A simple fix would be to remove the cursor statement, which is negated by the pointer-events anyway:

.btn
{
  // [..]
  &.disabled,
  &[disabled],
  fieldset[disabled] & {
    background-color: @btn-default-color;
    pointer-events: none; // Future-proof disabling of clicks
    .opacity(.65);
    .box-shadow(none);
  }
}