chore: reorder the fields on the back and put the radicals further down

src/templates/molaoshi/hear/back.html

src/templates/molaoshi/read_hanzi/back.html

src/templates/molaoshi/read_hanzi_traditional/back.html

src/templates/molaoshi/read_pinyin/back.html

src/templates/molaoshi/speak/back.html

src/templates/molaoshi/write/back.html