Alpha 173

• Added a hotkey to split all panes into separate tabs
• Added a hotkey to combine all tabs into the current one as panes
• Added an optional profile icon to tabs (Martin Grulich) #5767 - enable it in Settings -> Window.
• macOS: fixed app not quitting completely on Cmd+Q (Michael Wizner) #5743
• Locale: added Bulgarian
• SSH: HTTP proxy support
• SSH: try other OpenSSH key types besides RSA from ~/.ssh
• Bundled a Powerline-enabled fallback font - now you can use a non-Powerline font with a Powerline prompt and icons.
• Fixed docked window overlapping the Windows taskbar
• Show recent profiles in jump lists & dock menu
• Passthrough arrows+modifiers when in alternate buffer mode