[FIX] web_kanban: column_add_record

When grouping by a field datetime in kanban view, the name of the
column is an abreviated datetime. Afterwards, when making a quick
create, the abreviated datime was set in the context and
used as default value. So it raised a tracebacks because the value
of the datetime was not in the correct format.

Now it's only possible to make a quick create if the type of the field grouped
is a char, a boolean or a many2one.

opw:727266