Display Savegames in descending modified order

[Squelch]

On the Saves page, and the savegame selection dropdown on the Controls page, the saves are listed alphanumerically. It would be far more desirable to list them in descending modified order. This is particularly important for the savegame selection dropdown when attempting to recover from a crash or disruption by selecting a recent "known good" autosave.

The current workaround to to list the saves folder to find the modification times. For docker instances, this is a rather convoluted process, and overall, requires the game admin to have file permissions/SSH access which may not always be appropriate.