[Bug] Black SublimeLinter images

[Kristinita]

1. Summary

If I use MarkdownEditing,

    SublimeLinter icons have black colors for me in Markdown files.

2. Settings

Operating system and version:
Windows 10 Enterprise LTSB 64-bit EN
Sublime Text:
Build 3126
Package:
The latest stable version of MarkdownEditing for Sublime Text 3

3. Steps to reproduce

I reproduce the problem in a version of Sublime Text without plugins and user settings.

I install MarkdownEditing, SublimeLinter, any linter of SublimeLinter, CatGutter theme with patch. Ctrl+Shift+P (⌘⇧p for Mac) → SublimeLinter: Choose Theme → CatGutter theme.

4. Expected behavior

If I use SashaSublime theme:

User saw difference between yellow red errors and yellow warnings.

5. Actual behavior

If I use MarkdownEditor theme:

User don't saw difference between yellow red errors and yellow warnings.

6. Not helped

1. Enable/disable line numbers

2. Add gutterForeground and/or gutter keys in MarkdownEditor.tmTheme file.

3. If patch and SublimeLinter: Choose Theme → Circle:

   

   But if I select any gutter theme with images, I get actual behavior.

   

Thanks.