Better account-based wait status

include/Tracker.h

@@ -72,9 +72,8 @@ private:
     std::string existingAccount(const std::string& name) const;
     TaskRow existingTask(const std::string& name) const;
     std::optional<std::time_t> runningWait(const std::string& account) const;
-    void resumeAccount(const std::string& account);
+    void taskInUse(const std::string& taskName, const std::string& accountName);
     void makeTaskFollowAccount(const TaskRow& task);
-    void noteAccountWait(const std::string& taskName);
     void note(const std::string& message);
 
     Database& db_;