Rights: offer_* dává těsnější horní odhad

Momentálně má stenou implementaci jako can_*, jen navíc akceptuje
stav "po oblastech".

mo/rights.py

@@ -326,20 +326,17 @@ class RoundRights(Rights):
     def _is_configured(self) -> bool:
         return self._get_state() != db.RoundState.preparing
 
-    def _is_active(self) -> bool:
-        return self._get_state() not in [db.RoundState.preparing, db.RoundState.closed]
-
     def offer_upload_solutions(self) -> bool:
         return (self.have_right(Right.upload_submits) and self._is_configured()
-                or (self.have_right(Right.upload_solutions) and self._is_active()))
+                or self.have_right(Right.upload_solutions) and self._get_state() in [db.RoundState.running, db.RoundState.delegate])
 
     def offer_upload_feedback(self) -> bool:
         return (self.have_right(Right.upload_submits) and self._is_configured()
-                or (self.have_right(Right.upload_feedback) and self._is_active()))
+                or self.have_right(Right.upload_feedback) and self._get_state() in [db.RoundState.grading, db.RoundState.graded, db.RoundState.delegate])
 
     def offer_edit_points(self) -> bool:
-        return (self.have_right(Right.manage_contest) and self._is_configured()
-                or (self.have_right(Right.edit_points) and self._is_active()))
+        return (self.have_right(Right.edit_points) and self._get_state() in [db.RoundState.grading, db.RoundState.graded, db.RoundState.delegate]
+                or self.have_right(Right.manage_contest) and self._is_configured())
 
     def can_upload_solutions(self) -> bool:
         return (self.have_right(Right.upload_submits) and self._is_configured()