0.67-rc2

• Critical fix for missing page headers
• Critical fix by removing dependency on threading for index and socket handling
• Hidden option to also do autosave without thread to test further issues
• Critical fix for handling unicode file names on windows
• Fix issue where config values go missing if not used
• Fix error for file shortcuts in various dialogs
• Restored macOS integration using a plugin
• Shorter socket name to avoid os specific error on OS X
• More robustness for socket errors, fallback to --standalone automaticlly
• More robustness at startup when default notebook went missing, fallback to --list
• More robustness in preferences dialog when plugins give exceptions
• Merge patch to add accelerators for bookmarks
• Fix indexing errors on move/rename page
• Fix regression in close-page when autosave ongoing
• Fix regression drag-n-drop index pane
• Fix regression for keybindings in index pane
• Fix regressions for attaching files
• Fix regression for opening folders
• Fix regression in opening inter-wiki links
• Fix regression in custom tools
• Fix regression in completion of page name in dialog entry
• Fix regression in quicknote "--attachments" option
• Fix regression in date format for recentchanges dialog
• Fix for unicode in auto-linking
• Fix for unicode in arithmetic plugin
• Fix search regex for chinese language to not match whitespace for start/end of word
• Fix for table editor plugin when sorting rows
• Fix for wrong usage of escapes in latex export for verbatim blocks

Update to Zim 0.66