Removing item from playlist doesn't update index column

[JasonSpine]

Describe the bug
When you remove item from playlist row numbers aren't updated.
They stay the same.

So if your items were 1, 2, 3, 4...
When you remove 2, then they are 1, 3, 4.

To Reproduce
Steps to reproduce the behavior:

1. Open playlist, Ctrl+L
2. Drag your files onto playlist window.
3. Remove one item in the middle of the playlist.
4. See row numbers not reordered.

Expected behavior
Recalculate row indexes. All indexes after removed item should decrement by 1.

Screenshots
After removing third and sixth list item:

Your Enviroment

• SMPlayer version: 23.6.0
• OS: Windows 11
• Multimedia engine you're using with SMPlayer (preferences -> general): MPV