hide base/offset features in "create Structure" dialog by default

[psifertex]

Advanced options such as working with offset/base types and propagating data variable references are shown by default in the "create structure" dialog but they are advanced options many users may not use and it would improve the experience to fold those into a drawer/drop-down.

[alexrp]

FWIW, I'm not exaggerating when I say that 95%+ of the types I define make use of these features while reversing large C++ binaries. So if you do this, please be sure to make the dialog remember the opened/closed state of the drawer. :eyes:

[psifertex]

That's a great point -- it should absolutely remember the state.

[xusheng6]

Duplicate of https://github.com/Vector35/binaryninja-api/issues/4268