* Require retyping of attachment file names only when there are one or more external recipients. It was wrongly required even if there is no external recipient since the initial version reconstructed on WebExtensions APIs.
* Accept emphasysing with HTML format for dialog messages defined on custom rules with blocking actions.

Changes at 4.2.7:

* Apply dark color scheme to the body field in the confirmation dialog correctly, when the color scheme of the platform is dark.
* Restore height of the confirmation dialog correctly.
* Deactivate "check all" features completely if they are disabled.
* Support whitespaces in list names.

Changes at 4.2.6:

* Add new option to skip checking for internal recipients when the message has mixed internal and external recipients.
* Activate/deactivate checkbox state based on its dependency.