• Introduce an exception handler so a stack trace can be shown for fatal errors in PHP >= 7.
• Add separate persistence of QM window for front-end and admin area.
• Add the request and response HTTP headers to the Request panel.
• Introduce Started and Stopped columns in the Timings panel.
• By popular demand, revert back to closest first ordering of stack traces so they're inline with most other dev tools out there.
• Show the script handle in addition to the text domain in the Languages panel.
• Improve the panel menu highlighting colours.
• Better presentation of the default and current values for the settings constants.
• Truncate long host names in the Scripts and Styles panels.
• Add some more of the admin screen globals to the admin collector.
• Switch back to using a monospace font in numeric data cells.
• Allow dark mode to be enabled with QM_DARK_MODE.
• Display the total query count even when SAVEQUERIES is defined as false.
• Allow proper plural forms to be used wherever a phrase includes a numeric value.
• More style resetting for compatibility with Twenty Twenty.
• Avoid a division by zero when cache hits is 0.
• Switch to (mostly) CSS for the child menu item marker.