Feature/1129 fs url fields part of fs settings

[i-just]

Description

• “Files in this filesystem have public URLs” and “Base URL” fields moved to under “Filesystem Type”.
• New protected $showHasUrlSetting and $showUrlSetting properties were introduced in the FsTrait. They’re true by default, so if FS doesn’t implement any changes, it will work as before.
• In your FS, you can specify $showHasUrlSetting = false, which will stop the toggle from showing in the template.
• In your FS, you can specify showUrlSetting = false, which will stop the “Base URL” field from showing in the template, even if the “Files in this filesystem have public URLs” is on.
• project config structure remains unchanged (hasUrls and url are on the top level)

It’s all done as a non-breaking change and could be tidied up for Craft 5. For example, in Craft 5, $hasUrls and $url could be moved to fully be a part of the settings.

@timkelty At the moment, if the “Files in this filesystem have public URLs” toggle doesn’t show, the “Base URL” field also doesn’t show - LMK if you need this decoupled.

Related issues

dev-1129