* clarify error message for unfederated room invites * hide external user suggesetions * rename some descriptors * fix i18n * add warning for unfederated spaces * i18n Signed-off-by: Michael Telatynski <7t3chguy@gmail.com> * Add tests Signed-off-by: Michael Telatynski <7t3chguy@gmail.com> --------- Signed-off-by: Michael Telatynski <7t3chguy@gmail.com> Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>