Revert "update text macros to reflect how root path is now validated"

This reverts commit 4d312ccece9a635028f035722fde49f85985ff13.
Revert "ui_newt: reject format mount paths that are empty. this is the only"

This reverts commit 67b9002c0c9f3c4a0d2636b0fbb3690588e0eb59.
Revert "ui_newt: replace format mount point validation function with input"

This reverts commit fa98859955664a0c5eabcb1cb669dbf437f51f0c.