Fix: Fixed an issue where dragging or opening multiple items would use the wrong sort mode

[el-ev]

Resolved / Related Issues

• Closes Bug: Files doesn't drag and drop in sequential order into mpv #8534
• Closes Bug: Files doesn't open items by file name and uses selection order #15308

Steps used to test these changes

These changes make the behavior of opening or dragging and dropping multiple files consistent with Files Explorer.

1. Prepare 6 video files, named 1-6
2. Select them in any order
3. Click play all on tool bar or enter on keyboard
4. The 6 files open in the player in the same order as they appear in the file list
5. Set sorting to "by name ascending"
6. Select the 6 files in any order
7. Right-click on file 3, choose "Open" from the menu
8. The 6 files open in the player in the order: 3 -> 4 -> 5 -> 6 -> 1 -> 2
9. Select the 6 files in any order
10. Drag file 3 and drop on a Windows Media Player window
11. The 6 files open in the player in the order: 3 -> 4 -> 5 -> 6 -> 1 -> 2

[hishitetsu]

Overall, it's very good!

[0x5bfa]

Code quality

[0x5bfa]

LGTM, code wise.
As to 'internal' modifier, we can leave as is to keep consitency

[hishitetsu]

LGTM

[yaira2]

@qin-shihuang thank you! I previously attempted to fix this but couldn't get the logic quite right, really appreciate your help on this!