Planoplan 2.5.7

Reducing PC load in the background.

Furniture is turned off when moving the camera to 3D if the FPS (frames per second) is less than 20.

The window lining is divided into two parts, which can be painted separately.

Added ability to mirror several selected objects relative to the common center.

Added Ctrl+Shift+K combination for "Do not show on plan" property.

Fixed an error with disappearance of the "No texture" button after selecting material in the surface editor.

Fixed bug with substrate offset after loading another image.

Small fixes and improvements.