Can't open broken email bodies

[charlag]

Urlify fails on invalid HTML tags.

Logger.ts:90 error Error: token type was unexpectedly EndTag
    at e.current (worker.js:12:197391)
    at e.finishAttributeValue (worker.js:12:199543)
    at e.attributeName (worker.js:12:191493)
    at e.tokenizePart (worker.js:12:195534)
    at e.tokenize (worker.js:12:195279)
    at e.tokenize (worker.js:12:196864)
    at wd (worker.js:12:199726)
    at Td.attributes.rel (worker.js:12:200853)
    at Td (worker.js:12:201653)
    at urlify (worker.js:12:204254) Error: token type was unexpectedly EndTag
    at e.current (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:197391)
    at e.finishAttributeValue (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:199543)
    at e.attributeName (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:191493)
    at e.tokenizePart (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:195534)
    at e.tokenize (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:195279)
    at e.tokenize (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:196864)
    at wd (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:199726)
    at Td.attributes.rel (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:200853)
    at Td (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:201653)
    at urlify (file:///tmp/.mount_tutano4QItIh/resources/app.asar/worker.js:12:204254)

example body:

 Client: Browser
 Tutanota version: 3.100.0
Error
 Error message: token type was unexpectedly EndTag
Stacktrace: 
execute/Sd</e.prototype.current@https://mail.tutanota.com/worker.js:17:51236
execute/Sd</e.prototype.finishAttributeValue@https://mail.tutanota.com/worker.js:17:53388
attributeName@https://mail.tutanota.com/worker.js:17:45338
execute/Fd</e.prototype.tokenizePart@https://mail.tutanota.com/worker.js:17:49379
execute/Fd</e.prototype.tokenize@https://mail.tutanota.com/worker.js:17:49124
execute/Sd</e.prototype.tokenize@https://mail.tutanota.com/worker.js:17:50709
xd@https://mail.tutanota.com/worker.js:17:53571
Gd/<@https://mail.tutanota.com/worker.js:17:54700
Gd@https://mail.tutanota.com/worker.js:17:55498
urlify@https://mail.tutanota.com/worker.js:17:58178
handleMessage@https://mail.tutanota.com/common-d62b1623.js:1:16296
@https://mail.tutanota.com/common-d62b1623.js:1:15548
setMessageHandler/this._worker.onmessage@https://mail.tutanota.com/common-d62b1623.js:1:15118

in this case </e.prototype.current would be treated as a tag and it would fail.

Test notes

• Replace mail body with a broken one (breakpoint in SendMailModel.send and replace this.body), email should still open without issues
• Send an error report from Firefox (throw some error from the console?). The mail body should be openable without warnings about urlifying in the console.