After adding "code_by_companies" users cannot edit tax codes in mapping

[sergiomorillo]

The field "code" was replaced by function field "code_by_companies" in views, so now (from user POV) nobody can edit tax codes for a mapping .
Moreover there are another issues with company management:

• mapping allows empty company but when calculating report it searches mapping of the report company. Mapping with empty company are not taking into account.
• mapping allows tax codes of any company despite the mapping itself has company.
• new field "code_by_companies" filters tax codes by user company but should use report company due to a user accessing to many companies can calculate a report from a company different to current company.