Revert "Don't use cursor: pointer for buttons by default (#8962)"

This reverts commit ed3a4f3032.

src/css/preflight.css

@@ -315,6 +315,22 @@ textarea::placeholder {
   color: theme('colors.gray.400', #9ca3af); /* 2 */
 }
 
+/*
+Set the default cursor for buttons.
+*/
+
+button,
+[role="button"] {
+  cursor: pointer;
+}
+
+/*
+Make sure disabled buttons don't get the pointer cursor.
+*/
+:disabled {
+  cursor: default;
+}
+
 /*
 1. Make replaced elements `display: block` by default. (https://github.com/mozdevs/cssremedy/issues/14)
 2. Add `vertical-align: middle` to align replaced elements more sensibly by default. (https://github.com/jensimmons/cssremedy/issues/14#issuecomment-634934210)