• Fixes Missing file update after paste #1894

Changes:

• Whenever a watched directory receives an event from fsnotify, updates are now additionally sent to other watched directories that are equivalent (i.e. point to the same inode, for example bind mounts).
• The logic for watching directories is simplified. Now instead of calculating which paths to watch whenever the changing directories (e.g. using the updir/open/cd commands), directories will now be watched whenever it is loaded (i.e. added to the directory cache).