I have my main panel at the bottom. When I add an empty panel, then it's added to the left, but a new default panel is added to the top, even if the left side is available. Both panels should have same scheme and edge priority, so either a new empty panel should be added to the top or a new default panel should be added to the left.

Reproducible: Always

Steps to Reproduce:
1. Have your default panel at the bottom
2. Add a new empty panel and see that it's added to the left
3. Remove it and try to add a new default panel

Actual Results:  
Both panels are placed to different sides.

Expected Results:  
Both panels are placed to the same side.