1) Open Appearance Settings and select one of the themes that enforce right-side controls by default. These include "Clearlooks", "Dust Sand", "High Contrast" and "New Wave".
2) Click on "Customize".
3) Under both "Controls" and "Window Border", select your favorite theme which was left-sided by default. You'll see that the colors are correctly set automatically.
There is an indirect but easy solution for that:
1) Open Appearance Settings and select one of the themes that enforce right-side controls by default. These include "Clearlooks", "Dust Sand", "High Contrast" and "New Wave".
2) Click on "Customize".
3) Under both "Controls" and "Window Border", select your favorite theme which was left-sided by default. You'll see that the colors are correctly set automatically.