Bug 510497

STEPS TO REPRODUCE
1. Start Plasma System Monitor and navigate to a History page (or create a new one).
2. Click [Edit Page].
3. Add sensors/rows until the list contains more than 10 entries.
4. Arrange the rows in a specific, non-default order.
5. Click [Save changes].
6. Close the application.
7. Relaunch System Monitor and select the previously edited History page.

OBSERVED RESULT
The rows on the History page are displayed in an incorrect order. Row 10 is placed immediately after Row 1 (e.g., Row 1, Row 10, Row 2, Row 3...).

EXPECTED RESULT
The rows should maintain the configured numerical order (Row 1, Row 2, ..., Row 9, Row 10).

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: OpenSUSE Tumbleweed 20251007 
KDE Plasma Version: 6.4.5 
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2

ADDITIONAL INFORMATION
The issue appears to be due to lexicographical (alphabetical) sorting of the row indices in the configuration file (~/.local/share/plasma-systemmonitor/*.page) instead of numerical sorting. For example, row index '10' is incorrectly placed immediately after '1' instead of after '9'.