Fixed ignoring a file also ignoring the entire directory that contains it

[e-nikolov]

Currently if a path to a file rather than a directory is specified to be ignored in the config, the rest of the files in its parent directory that come after it alphabetically will also be ignored.

[qhenkart]

the default behavior of realize is broken without this PR. Typing realize start creates the default yaml file that includes ignore paths .git and .realize. If either of those are files, then nothing will be watched