4.2.10

• Show new tab action selectors on both side of the new tab button correctly, when both container selector and relation selector are active. (by bb010g, thanks!)
• Restore tree of tabs certainly on crash recovery and/or manual restoration of the previous session. (by tkng, thanks!)
• Fix handling of closed tree restoration: multiple tabs of a closed tree are now restored with single action correctly. (by tkng, thanks!)
• Many performance improvements with optimizations (#3831, #3836, #3837, #3838, #3839, #3843, #3847 and #3848 by tkng. Thanks!)
• Some performance improvements with optimizations around reduced reparsing of JSON strings while dragging and reduced reflowing.
• Apply and update auto-sticky state of tabs correctly, even if they are specified by other addons. (by tkng, thanks!)
• Update custom tooltip text more correctly. (by tkng, thanks!)
• Many cleanup of codes for future maintainability. (#3832, #3833, #3835, #3844, #3849, #3851 and #3852 by tkng. Thanks!)
• Suppress errors from handling of successor tabs when a tab is closed before the successor information is updated.