Suggestion - a 'Center' option for image alignment

Not sure if this is the right place for this, or if you even take suggestions, but there really needs to be a 'Center' option for image alignment.  It should be trivial to add: add a CSS class (call it .ck_center) to an image that has the following styles:

.ck_center {
    display: block;
    margin: 0 auto;
}

Far better than messing with HSpace.