remote support

[akosyakov]

An extension fails to work in remote settings like Gitpod: gitpod-io/gitpod#4513

The issue is that CSP policy hardcoded to use localhost:

LaTeX-Workshop/viewer/viewer.html

Line 29 in ba9a629

<meta http-equiv="Content-Security-Policy" content="default-src 'self'; base-uri 'none'; connect-src 'self' ws://localhost:* ws://127.0.0.1:*; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:;">

But should use webview CSP.

Please see for details: https://code.visualstudio.com/api/advanced-topics/remote-extensions#using-the-webview-api

[tamuratak]

This is intentional. We load viewer/viewer.html as the src of iframe through a local server. We should not use the webview CSP.

We will not support gitpod on our side.