Problem
-> see main Issue

Solution
In the RAG Window for a LR:

• Remove the examples completely. They are unneccessary for RAG. It will not be possible to send indivudual examples in RAG
• The examples will be sendable (only source, source and target) for the whole RAG, see https://jira.translate5.net/browse/TRANSLATE-5419
• This may requires some splitting of the currently combined UI with the Training
• Remove the "Add sys message" button within a prompt (general functionality to have multiple sys-messages in one prompt will still exist)

DEVELOPER NOTES

• Removing "Add Sys Message" is not useful because it may be needed when creating a new prompt in the RAG management ... but I belive with the improved layout of https://jira.translate5.net/browse/TRANSLATE-5418 this is no problem as the button is a simple "+" symbol now.