Using @import "base.css" will not re-minify when the base.css file changes with minify on change option

[shaipetel]

Describe the bug
Assume I have 2 css files:
base.css
app.css

in app.css I import base.css "@import "base.css"
in app.min.css - a copy of the base.css is added instead of the import statement.

Now - assume I made changes to base.css.

in the raw CSS version of app.css I have the @Impot statement, which works fine when base.css is modified.

However. app.min.css will not be updated with the changes made in base.css until app.css is re-saved.

To Reproduce
Steps to reproduce the behavior:

1. Create base.css
2. Add class ".class1{ ... }"
3. Create app.css and minify it
4. Use minify on save: "exists" settings
5. Add @import "base.css" to app.css
6. Review app.min.css -- class1 is there.
7. Edit base.css and add ".class2{...}"
8. Save base.css
9. Review app.min.css -- class2 is missing.
10. Open app.css and hit save
11. Now class2 is added to app.css

Expected behavior
Using the minify on save option should re-create the min file if any of the imported files change.

Desktop (please complete the following information):

• OS: Windows 10
• Version 3.3.2