Provide a way to add line breaks to user actions

[amartinz]

To improve readability, it would be nice to have support for line breaks in user actions, for example:

  fastbootd:
    title: "Reboot to Fastbootd"
    description: "With the device powered off, hold Volume Down + Power to boot into recovery.<br><br>Inside the recovery, press on 'Advanced' and select 'Enter fastboot'."
    image: "phone_power_down"
    button: true

<br> does not get handled and is rendered in text.
\n does not get handled and removed from text.