Fixed #3579788, not doing backups on windows when no backup directory given
Fixed #3574500, I/O error on first save attempt (when backup settings
Added macro: Open Selection In Desktop (File section)
Open Selection macro: fixed missing comment slash
Open Selection macro: explicit folds
Open_Selection macro: the path under caret is used in case of no selection.
Fixed $Plugins appearing in VFS browser context menu, now mnemonic is assigned
Fixed threading api comments (#3563789 Jarek Czekalski)