Any plans of upgrading ExtJS 4 to ExtJS 5/6 by xCP team? Anybody has any insight on this upgrade roadmap? This will be helpful in designing responsive UIs as the latest version has great support for responsive pages.
Yes we do plan on upgrading to ExtJS 6 using the 'classic' toolkit, but we may not have responsive design capabilities in the next release, it may take longer for us to expose it in the Designer. Once we do upgrade though, you would be able to build your own custom widgets that do support responsive features.
Any tentative date on next release?