FileBrowser could benefit from two sorting improvements:
1) When it's created, it doesn't explicitly sort the table view on any column, thus leaving the file sort order up to the OS. This is non-deterministic and leads to the files being in seemingly random order on some platforms. We should explicitly set the default column sort order to be file name ascending.
2) When you re-sort the table view, the text input containing the selected file gets cleared (if it contained text of a file not found in the current folder). The selected file should be preserved across sorts.
3) TerraFileBrowserSkin's default sort (NAME) should put folders before files. This would cause the default sort to sort by folders alphabetically, then by files alphabetically. Currently, all folders and files are sorted alphabetically, with folders and files intermingled.