Maintenance release

Changes:

• [#8329] ConEmu 20.07.13
• [#8323] Dark silver theme
• [#8319] Resize also the backup/default avatar image
• [#8318] FormCommit: No summary for deleted submodules
• [#8296] Disable Finish button while loading branches in GitFlow form.
• [#8287] Restore FileStatusList focus after GoToChild/Parent
• [#8277] Track theme colors via Telemetry
• [#8274] Avoid console printouts when submodule updates are throttled
• [#8266] Fix ssh not found
• [#8250] Fix "selection only" text search on Diff view (#7784)
• [#8212] Recover lost object: Add a file preview

⚠️ The portable package must be unpacked into an empty folder - a list of settings files you might want to retain.