V7.5.0-rc6

This is the sixth release candidate for Tribler 7.5 series. It features numerous bugfixes and some minor usability improvements over 7.5-rc5.

Attention, owners of big channels! Previous versions of Tribler (7.3+) contained a bug that could have resulted in the corruption of the personal channel torrent. This release fixes the bug, and will automatically re-commit the channel in case it was corrupted. However, if your channel is very big, Tribler will appear stuck for a long time. We apologize for the inconvenience.

• Fix InvalidStateError in UdpSocketManager
• Disable BTC wallet
• Fix iteration on keys in request manager
• Fix race condition in subscription widget
• Refactored subprocess to QProcess
• Fixed dht_pkt_alert processing
• Increase channel regen timeout in accord with DHT wait
• Fix debug window crashing on memory history plot
• Fix losing trackers when adding by magnet
• Fix DHTHealthManager
• Update IPv8 pointer
• Change limits for DHT peer count
• Added DHT buckets tab to debug panel
• Added PingChurn strategy to DHTDiscoveryCommunity
• Fix flooding DHT with bursts of requests
• Do not reset channel view on tab switch
• Fix creating torrents outside a channel
• Remove unused files
• Stop notifiying the GUI on channel downloads finished
• Cache get_channel_name results
• Remove CreditMining feature
• Fix GUI tests
• Don't show circuit flags if not ready
• Exchange intro request/response with all peers in the TunnelCommunity
• Update IPv8 pointer
• Improve tunnel debug panel
• Define default downloads dir value
• Fix test_select_download_file
• Updated AnyDex pointer
• Fix exporting libtorrent stats
• Fix unicode error in peer_info
• Regenerate broken channel torrents on startup
• Fix channel corruption by delete entries
• Fix checkpoint upgrade
• Fix recheck after updating hop count
• Reuse DHT metainfo when downloading channels
• Updating items label when receiving new channels
• Hiding 'Complete' label in GUI
• Remove download option appearing on channel entries