Add workaround for payload upload/download rate

The graphs are showing 0 for both payload upload & download rate but
torrent statistics aren't, so suppress it manually.
The workaround only applies to paused state for now.

Closes #17294.

src/base/bittorrent/torrentimpl.cpp

@@ -1329,12 +1329,14 @@ qreal TorrentImpl::realRatio() const
 
 int TorrentImpl::uploadPayloadRate() const
 {
-    return m_nativeStatus.upload_payload_rate;
+    // workaround: suppress the speed for paused state
+    return isPaused() ? 0 : m_nativeStatus.upload_payload_rate;
 }
 
 int TorrentImpl::downloadPayloadRate() const
 {
-    return m_nativeStatus.download_payload_rate;
+    // workaround: suppress the speed for paused state
+    return isPaused() ? 0 : m_nativeStatus.download_payload_rate;
 }
 
 qlonglong TorrentImpl::totalPayloadUpload() const