[web] use `inline` `Content-Disposition` by default (closes #2535734)
since known time we have been serving static file with a `filename` parameter on
the `Content-Disposition` header. But since d74addac92bb we explicitly serve
file as attachment if a filename is provided. However this is valid to have
`inline` disposition and `filename` parameter. This changeset revert this part
of d74addac92bb, going back to `inlined` by default.
`IDownloadable` code explicitly request `attachment` content to preserve
expected behavior.
[MESSAGES CONTROL]
disable-msg = C0301
[VARIABLES]
# Enable / disable this checker
enable-variables = yes
additional-builtins = _, display_name
[BASIC]
required-attributes=
attr-rgx = (w|[a-z_][a-z0-9_]{2,30})
variable-rgx = (w|[a-z_][a-z0-9_]{2,30})$
argument-rgx = (w|[a-z_][a-z0-9_]{2,30})$
[TYPECHECK]
generated-members=debug,info,notice,warning,error,critical,exception