editorconfig settings for [*] do not get applied to hidden files in Web IDE

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Summary

When using the Web IDE in conjunction with a .editorconfig file that applies rules via the [*] file spec, it doesn't apply those rules to hidden files such as the .gitlab-ci.yml file.

Steps to reproduce

1. Create repo with a .editorconfig with the following content:

# This file is the top-most EditorConfig file
root = true

# All Files
[*]
trim_trailing_whitespace = true

2. Create a hidden files (e.g. .gitlab-ci.yml) with whitespace at the end of a line
3. Save the file (toggle to a different file)

Example Project

https://gitlab.com/-/ide/project/peanderson/editorconfig_test

What is the current bug behavior?

Files end up incorrectly formatted when committed to source control

What is the expected correct behavior?

[*] rules should be applied to hidden files (files that start with .)

Relevant logs and/or screenshots

Has whitespace:

No whitespace (only newline char):

Output of checks

This bug happens on GitLab.com