Remove redundant file sorting in FoldersController

[arukompas]

Summary

• Replaced sortByEarliestFirstIncludingFiles() with sortByEarliestFirst()
• Replaced sortByLatestFirstIncludingFiles() with sortByLatestFirst()
• File sorting is already handled by the loop on lines 41-56, making the IncludingFiles methods redundant

Test plan

• All 273 tests pass
• Feature tests verify folder and file sorting behavior remains unchanged