LPS-48405 allow admin to choose rating type

Add a configuration option to choose between star and thumbs ratings.
LPS-48405 remove comments JSPs

Note that we're keeping the `article_comment.jsp` though we're not using
it.  That JSP is used in other LPS we're working on in parallel. To
avoid rebase conflicts we're keeping it as is.
LPS-48405 don't show success message to the user
LPS-48405 allow users to give feedback more than once

When the context requires to show a user message, show the last one.
LPS-48405 add method to get all user suggestions on an article
LPS-48405 show previous suggestions

Allow the user to see her previous suggestions and to add new ones with
no need to give feedback using thumbs up/down.
LPS-48405 allow users to add a message directly
LPS-48405 make the two suggestion forms exclusive
LPS-48405 UI improvements
LPS-48405 Match the id
LPS-48405 Include JS code only when the node is rendered
LPS-48405 Ensure the order
LPS-48405 SF
LPS-48405 add upgrade process to remove unique restriction
LPS-48405 configure ratings score for thumbs
LPS-48405 We need and orderByComparator to provide it to the service. Since there are 2 comparators for KBComment I also created a new method in the util class.
LPS-48405 autogenerated
LPS-48405 Better grammar
LPS-48405 Undo service.properties changes
LPS-48405 Minor spacing