* util-iso: try to fix uefi usb boot
* util-iso-*: put grub-theme in livefs
* util-iso-boot: reduce efi.img size
* util-iso: readd xorriso args
* util-iso: fox mod_date length
* util-iso: don't create mod_dte file for now
* [util-iso] try to fix issue with efi.img
* util-iso-boot: remove grub video dir
* util-iso: clean up assemble_iso()
* doc: remove obsolete entry from deployiso
util-yaml: formating fix
* util-iso: set the grub theme by $iso_name