Remove unsuccessful selectors

[martic]

Describe the bug
Maybe this is more a feature request.

When regex selectors don't match can the regex be removed.
I use this rule to help me organise my Gmail.
[Email:{.ain a}] {H2.hP} [from] {.gD span} [to] {.acZ.xD [email]} [tag] {.ahR div[name^="C/"]}
This works great while an email is opened, but not when in in the inbox.

To Reproduce
Steps to reproduce the behavior:
Make a rule for gmail.
explore gmail using rule

Expected behavior
I would like the unsuccessful tags to be hidden
so instead of seeing this in the inbox:
[Email:inbox] {H2.hP} [from] {.gD span} [to] {.acZ.xD [email]} [tag] {.ahR div[name^="C/"]}
I see this:
[Email:inbox] [from] [to] [tag]
Bonus would to also control text if the regex fails
So its just this:
[Email:inbox]

Screenshots
Title when an email is open, which is great.

Title when displaying the Inbox:

Perhaps, a toggle option can be selected to turn this option on and off.

Thanks for a great plugin!

[martic]

Just a thought, but if the updateTitle function was updated as below, would this effect other functions?

function updateTitle(title, tag, value) {
return value ? title.replace(tag, decodeURI(value)) : title;
}

Update to:

function updateTitle(title, tag, value) {
return title.replace(tag, decodeURI(value || ''));
}