Remove "cursor: pointer" from quota cell

The quota is set through a dropdown, and this dropdown is only shown
when clicking on the select element itself. Therefore, the cell should
not show a pointer when hovering on it but outside the select element.

Note that although the removed "&.quota" selector also set a "width"
declaration that declaration was later overriden by
"#userlist td.quota", so it was not needed.

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

settings/css/settings.scss

@@ -543,7 +543,7 @@ td {
 	&.displayName > img, &.quota > img {
 		visibility: hidden;
 	}
-	&.password, &.quota, &.displayName {
+	&.password, &.displayName {
 		width: 12em;
 		cursor: pointer;
 	}