- fix rotation (only integer possible)

src/lib/elements/controls/SelectItemElement.ts

src/lib/elements/images/Image.ts

src/lib/elements/primitives/ArrowPrimitive.ts

src/lib/elements/primitives/BackgroundRectanglePrimitive.ts

src/lib/elements/primitives/EllipsePrimitive.ts

src/lib/elements/primitives/RectanglePrimitive.ts

src/lib/elements/primitives/TextPrimitive.ts

src/lib/elements/rotatings/RotateScaleElement.ts