Advanced filter editor shouldn't delete empty strings and duplicate comments

[KolbasovAnton]

AdGuard version

7.15.1 (4386)

Browser version

Chrome 119.0.6045.160

OS version

Windows 11 ver. 10.0.22631 build 22631

What filters do you have enabled?

No response

What Stealth Mode options do you have enabled?

No response

Support ticket ID

No response

Issue Details

Steps to reproduce:

1. Settings - Ad Blocker - Filter editor.
2. Choose "User rules" filter (add a couple of comments and rules in advance).
3. Click on pen icon (advanced filter editor) and add some empty strings and duplicate comments.
4. Save and exit advanced editor.

Actual Behavior

No changes saved.

Expected Behavior

Advanced editor shouldn't sort user's changes by himself.

Screenshots

https://github.com/AdguardTeam/AdguardForWindows/assets/147173080/315facf4-11a2-4909-ae47-e2cfb127306f

Additional Information

No response