Allow to rotate object in the preview of the shader panel

I like the current preview shader panel, it allows to select predefined shapes. But sometimes with textures and bump mapping, you would like to rotate the object to see how it behaves with light, you could do that in the main 3D viewport but it would not be as convenient and fast. Like if you hold click inside the preview it captures the mouse and when you move the mouse it just rotates the object. When you release the mouse it goes back to normal.