Delete the actual List page

[frantz45]

When all the following issues will be fixed we should delete the actual List page:

• [ ] https://github.com/airbus-cyber/graylog-plugin-alert-wizard/issues/21
• [ ] https://github.com/airbus-cyber/graylog-plugin-alert-wizard/issues/76
• [ ] https://github.com/airbus-cyber/graylog-plugin-alert-wizard/issues/77
• [ ] https://github.com/airbus-cyber/graylog-plugin-alert-wizard/issues/78
• [ ] https://github.com/airbus-cyber/graylog-plugin-alert-wizard/issues/79
• [ ] https://github.com/airbus-cyber/graylog-plugin-alert-wizard/issues/80

Don't remove list created by this old way because some rules may use them.

[c8y3]

We need about the import of previous rules with lists...