[Enhancement] Improve this error message by appending two checks: form security failed because of a token mismatch

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When this error occurs in the client browser: The form security failed because of a token mismatch. Please reload the form and check that your cookies are on Part of the error message could the following:

1. In the browser, check whether cookies are on. Just run this and modify the error message:

if (navigator.cookieEnabled) {
    console.log("Cookies are enabled.");
} else {
    console.log("Cookies are disabled.");
}

2. In the backend send a check for SSL (a cause of this error). The logic already exists: it is part of Matomo's System Check, in the Admin >> Diagnostics

This is a high frustration error for users as it keeps them logged out of their Matomo. Recently a team of 5 users, staring down a promised deadline, were all locked out for 5 days and 5 emails because of this error.

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This issue has been mentioned on Matomo forums. There might be relevant details there:

https://forum.matomo.org/t/cant-log-into-matomo/52251/5