Escaping in xlsx reports

[NikitaShchienko]

Environment

• Platform version: 7.1

Description of the bug or enhancement

Add the ability to escape lines in xlsx reports.

Forum: https://www.cuba-platform.com/discuss/t/reporting-band-inside-band/3008/10

[Desire456]

Reverted because needs to be discussed.
Code to solve the problem:

            CTXstringWhitespace t = ObjectUtils.defaultIfNull(is.getT(), Context.getsmlObjectFactory().createCTXstringWhitespace());
            t.setValue(value);
            t.setSpace("preserve");
            is.setT(t);
            newCell.setIs(is);
            newCell.setV("");
            if (newCell.getT() == STCellType.S || newCell.getT() == STCellType.STR) {
                newCell.setT(STCellType.STR);
                newCell.setT(STCellType.INLINE_STR);
            }