[FIX] crm, hr: fix web_tip css selectors

Some selectors were broken by layout changes in
d822766296fed8f72d3168c675d4cf0b89e73f0c
[MIG]migrate to new api

[IMP]remove unneccessary stuff
[IMP]remove dead code
[IMP]improved qweb exception after rebase not found author_avatar related field