Add relate from party to deposit lines

It is frequent to want to see the history of the deposit of a party. So I think such relate will be helpful.

assigned to @ced

added accounting type::feature + 1 deleted label

New review49751002 at https://codereview.tryton.org/49751002/#ps1

review49751002 updated at https://codereview.tryton.org/49751002/#ps2

added 1 deleted label and removed 1 deleted label

New changeset 7183cb0d260e by Cédric Krier in branch 'default':
Add relate from party to deposit lines
https://hg.tryton.org/modules/account_deposit/rev/7183cb0d260e

added 1 deleted label and removed 1 deleted label

closed

New changeset c8fbf8292054 by Cédric Krier in branch 'default':
Add relate from party to deposit lines
https://hg.tryton.org/tryton-env/rev/c8fbf8292054