Super grateful for your work on this extension, as it brings better MJML functionality to my favorite editor.

Not sure if this is a feature request or a bug, but .mjml files imported using <mj-include> do not render in the preview window, nor are they included when exporting to HTML.

Trying to componentize my templates, but swapping out my preheader and header/nav sections with

<mj-include path="./preheader" />
<mj-include path="./header" />

results in a preview without either. Exporting to HTML does not include them either, they're just skipped. The linter doesn't recognize mj-include elements. Putting the includes in the same folder or a subfolder, including or omitting the file extension, makes no difference.

This functionality works in the MJML desktop app v2.4.0 running MJML v3.3.3

I am running extension v0.0.2 and VS code 1.13.1 on Windows 10 Creators Update.