Just "packed" doesn't always pack the way we expect.

	than crashing.

	hook pass-through parameter. All users updated and unnested.

	* include/grub/unicode.h (GRUB_UNICODE_DOTLESS_LOWERCASE_I): New enum
	value.
	(GRUB_UNICODE_DOTLESS_LOWERCASE_J): Likewise.
	* grub-core/font/font.c (grub_font_construct_dry_run): Replace i and j
	with dotless variants when any combining above is present.

	* grub-core/normal/charset.c (grub_unicode_aglomerate_comb): Don't
	agglomerate control characters with combining marks.
	(bidi_line_wrap): Allow break on tab.
	(grub_unicode_get_comb_start): New function.
	* grub-core/normal/menu_entry.c: Restructure to handle wide characters
	and tab correctly.
	* grub-core/normal/menu_text.c (print_entry): Replace \n, \r, \b and \e
	with a space.
	* grub-core/normal/term.c (print_ucs4_terminal): New argument
	fixed_tab_size. All users updated.
	* include/grub/term.h (GRUB_TERM_TAB_WIDTH): New const.
	(grub_term_getcharwidth): Handle \t.
	* include/grub/unicode.h (grub_unicode_glyph_dup): Fix allocation
	and copy.

	(grub_bidi_line_logical_to_visual): Skip tags. They are deprecated.
	* include/grub/unicode.h (GRUB_UNICODE_TAG_START): New enum value.
	(GRUB_UNICODE_TAG_END): Likewise.
	(GRUB_UNICODE_LAST_VALID): Likewise.

	len and make it smaller. All users updated.
	* util/import_unicode.py: Put length and not end character.
	Check length.