"Sort by" should have better options than "ascending"/"descending"

[Explorer09]

This is more of a usability improvement than a bug report.
(Simple File Manager 6.16.1 running on Android 10)

The option labels "ascending" and "descending" should change depending on the property being sorted by.

• By name: "0 to 9, A to Z" and "Z to A, 9 to 0"
• By size: "Small to large" and "Large to small"
• By last modified: "Oldest to newest" and "Newest to oldest"
• By extension: same as by name