Windows Long-File-Path Detection

Find the "Windows Registry LongPathsEnabled" in the "Environment" table, to detect if the user has LongPaths enabled in their registry.

This gives developers a chance to check for platform support for long paths before executing complex Actions that might break when file operations have problems related to long paths.

Tablecalc FileIO: add some extra functions

FileIO now has:

FileIO.File.fopen_append()
Open a file with this function, and any writes will append to the end of the file - good for log files.
You cannot read from a file opened in this way.
FileIO.Dir.make_directories()
Call this to create a blank directory (aka folder), and automatically create any missing parent folders in the new path.

Markerstyle: Auto-reload Override File

Markerstyles now will check and reload the override file when Reload-Data executes.

This means you could generate a custom markerstyle colour table, export to disk, and the markerstyle will sync once Reload-Data runs.

Tablecalc: better support for large memory usage

Tablecalcs would crash if asked to allocate too much memory.

This has been improved, if you still have problems then please get in touch with support.

Bugfixes

FileList was incorrectly showing an error when it found exactly the correct number of files specified.
Correctly hide the "?" button when appropriate, for Tableviews.