[req] avoid getting w in cw_extra_kwargs when calling .view

[config] rename remaining inputlevel to level in option definitions, as expected by lgc >= 0.50

[fti] simplify UpdateFTIHook code

[twisted] we must set response code before starting to write the answer, else it's ignored

cleanup

[web data] remove files not used by the framework

[css] keep old css according to a configuration variable (true by default)

[3.8 execute] remove deprecation warnings

backport stable

[dbapi] missing import

[ajax] missing html heads processing in reloadComponent (sic\!)

[deprecation] missing version number to old warning message

[table view] we should call the cell view using the table rset, not one rebuilded for a specific entity

[table view] take care to None label

[selectors] new logged_user_in_rset selector

merge

replaced hardcoded 'web/view' by os.path.join('web', 'view') so views path is also valid under windows

fixed bug of non-normalized path under Windows, that broke the reload mechanism

[c-c list] configuration pb cubes directly hold version number now, avoid crash when reporting errors

Handle new way of reporting unmodified FileFields when a FileField has not been modified, value is an empty string. Handle this is raise UnmodifiedField accordingly.

merge

attempt to port windows service to 3.8.1

[web session] fix potential key error on logout (occurs once the session has been transparently reconnected, hence session.sessionid and session.cnx.sessionid differs)

[css] update print css