Add warning for multipolygon members with no set role (close #5851)

data/core.yaml

@@ -1243,6 +1243,11 @@ en:
       points-lines-areas-relations:
         message: "Deleting {n} features: {p} points, {l} lines, {a} areas, and {r} relations"
       tip: "Only redundant or nonexistent features should be deleted."
+    missing_role:
+      title: Missing Roles
+      message: "{member} has no role within {relation}"
+      multipolygon:
+        tip: "Multipolygon members must have an inner or outer role."
     missing_tag:
       title: Missing Tags
       any:
@@ -1283,6 +1288,8 @@ en:
         annotation: Removed an old tag.
       remove_deprecated_tag_combo:
         annotation: Removed an old tag combination.
+      remove_from_relation:
+        title: Remove from relation
       remove_generic_name:
         title: Remove the name
         annotation: Removed a generic name.
@@ -1295,6 +1302,10 @@ en:
         title: Reposition the features
       select_preset:
         title: Select a feature type
+      set_as_inner:
+        title: Set as inner
+      set_as_outer:
+        title: Set as outer
       tag_as_disconnected:
         title: Tag as disconnected
         annotation: Tagged very close features as disconnected.