Feature Request: Toggle switch to allow self-signed CA certificates

[1010rob]

Hi, first of all thank you for writing this app!

Would it be possible to add a toggle switch to allow user installed CA certificates in the app, so that the app can communicate with services that are using self-signed certificates (such as self-hosted servers)?
Right now I've managed to allow all user installed certificates from the phone in the app by changing network_security_config.xml to:

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config cleartextTrafficPermitted="true">
        <trust-anchors>
            <certificates src="user"/>
            <certificates src="system"/>
        </trust-anchors>
    </base-config>
</network-security-config>

This causes the app to use recognize the user-installed CA I have on my phone, and it works just fine for me as it is. However, other users might want a toggle switch in case this behavior is undesired for their use case. I'm not sure how difficult this is to implement.