• feat: #2864 added GridStackOptions.layout for nested grid reflow during resize. default to 'list'.
• fix: #2859 re-enabled tests and fix numerous issues found (see CL). Also thank you lmartorella for getting me going and starting it.
• fix: #2851 added support for custom max layout saving - Thank you lmartorella
• fix: #2492 loading same layout with overlapping widget fix. v10.3.0 regression.