Syntax error when using "/" in filter aggregations.

[ceeeekay]

After upgrading to Kibana 4.4, some previously working visualisations are reporting errors when interacting with them, e.g,

Uncaught Error: Syntax error, unrecognized expression: [data-label="program:"postfix/smtpd""]

I've tracked it down to use of filter aggregations which contain the slash character, even if they're quoted. I've worked around it in the mean time with a ? wildcard in place of the slash.

I questioned this in #kibana and was told to report it here as a bug.

Happy to provide source for the vis, but it should be quite easy to reproduce.

[rashidkpc]

Dupe of #6174