File UI changes (#19014)

* Remove recursion into folders on Manage Files.  May be enabled with UFILESYS_RECURSEFOLDERS_GUI.  On Edit of a file, Save and Magane btuttons return to the folder containgint the file being edited.  On delete file, UI returns to the folder that the deleted file was in.

* Make newfile put in in the current folder, and return to current folder on save of manage button.

* Add folderOnly and FileOnly functions to reduce code duplication.
Enable folder delete.
Enable folder listing to be aborted (x in browser)
Disbale ESP32 Download Task.  Needs attention.
Allow folder create from newfile name.