[Users] Proper regex filter

[mr queue]

I'm trying to match any message with a pair of brackets in the subject.
i.e. [foo] or [BAR]. However it seems that my regex is being mangled when
setting it up. If I do:

"\[.*\]"

That gets changed when I hit replace or ok with:

"\\[.*\\]"

If I do not escape it, it isn't mangled, but should not match and doesn't.

"[.*]"

Any ideas? I've looked around google a bit and it seems claws can get a bit
picky on what would typically be a standard regex.

Regards,
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