Streamline frontend login to be compatible with css styled content and fluid styled content
The content element "Login" currently has several issues especially with fluid styled content.
- Login is configured to work best with css styled content
- Wrapping frames are completly missing, even fields are available
- Base configuration is loaded by ext_typoscript_setup and highly depends on the configuration of the static template, this makes it hard to override or make adjustments
- Configuration is in most cases only possible with adjusting the typoscript setup because constants are not existing