Series sale import: use its own interface and form

[0pdd]

The puzzle 995-f1c8f888 from #995 has to be resolved:

mystamps/src/main/java/ru/mystamps/web/feature/series/importing/RequestImportForm.java

Line 41 in bc3fe55

// @todo #995 Series sale import: use its own interface and form

The puzzle was created by Slava Semushin on 03-Jun-19.