Show all groups on one tab

I think that it would be more convenient to make the switching option "Show all groups on one tab" - one above the other (separated from each other). Now it not so comfortable - it's impossible to separate tabs on the same topic from the tabs to the next. But to jump between multiple groups even more uncomfortable - so I have to save all tabs on different topics in a single group without any separation.
Also, groups can be done "minimizes to icons" by mouse clicking on some group header.
And here I saw a proposal - to make different backgrounds for different groups. That would be wonderful!
All the best!