Nanskip

Results 3 issues of Nanskip

Added check on shape.ChildrenCount, returns error if it's nil.

If item has long name, copy identifier button dissapears or moves too right. Here's the screenshot: ![Cubzh_YIEkwZQqvs](https://github.com/user-attachments/assets/61e89607-3ad5-45d5-9370-b769690031fd)

![image](https://github.com/user-attachments/assets/819a834e-c1ba-4145-8cff-078a6b3a20a9) Rotation cube in item editor doesn't look good. Text looks good but cube itself should be bigger.