Restore torrent in two steps

Add/restore all torrents in "paused" state and then resume those
that need to be really "resumed" (added/restored in "resumed" state).
Keep torrents with missing files paused.
Force recheck torrent with missing files when it's resumed by the user.

src/base/bittorrent/torrenthandle.h

@@ -461,11 +461,19 @@ namespace BitTorrent
         bool m_hasMissingFiles;
         bool m_hasRootFolder;
         bool m_needsToSetFirstLastPiecePriority;
+        bool m_needsToStartForced;
 
         bool m_pauseAfterRecheck;
         QHash<QString, TrackerInfo> m_trackerInfos;
 
-        bool m_started = false;
+        enum StartupState
+        {
+            NotStarted,
+            Starting,
+            Started
+        };
+
+        StartupState m_startupState = NotStarted;
         bool m_unchecked = false;
     };
 }