Edit Map Feature bug

[Shasan634]

Describe the bug
The application crashes when the user opens Edit Map Feature, clicks Add New Feature, closes the window, and then reopens Edit Map Feature

Steps to reproduce:

1. Click Edit Map Feature.

2. Click Add New Feature.

3. Close the window.

4. Click Edit Map Feature again.

Expected result: The panel should reopen normally.
Actual result: The application crashes.