Was looking a bit janky with the style changes.

Just sort of winging it.

For #1306.

Also make it a number.

Fixes #1312.

Closes #446

If you want to use the last visited directory you should omit the
directory from the command line.

Fixes #1132.

As best we can, anyway.

Instead of the first.

Should make language packs work again.

It still won't work behind a base path, but if you're using a reverse
proxy you can just redirect to HTTPS yourself. And should probably
handle TLS termination there too.

For sockets I just needed to add back the proxy call.

I temporarily removed this during the refactor so it needed to be added
back. This time I bundled it with the nbin loader code since it's all
related (will also make it easier to remove).

Just display the error message and exit. The stack trace isn't necessary
(since it's likely user error) and is potentially confusing.

- Add VS Code icon
- Trim dashboard to just display dedicated VS Code section
- Version was getting unset during build
- Add back nbin shim which I temporarily took out earlier
- Update tests for log level env var changes

Fixes extension icons not loading.

Might fix #1181, although not for the reasons I initially
thought (because the URLs are resolved from the manifest path, not the
path of the current page). This should ensure that the URLs used by the
manifest are always correct regardless of the manifest's path.

Also add a way to force a check.

Just a login form and a list of applications. No modals or anything like
that.

Now it should work whether you have a trailing slash or not.

Reworked from d5740128 to fit in the
new structure.

When using a query parameter without a scheme, the scheme defaults to
`file`. This results in the files in the explorer being technically
different from the file picker files because they are file:// instead of
vscode-remote://, causing the same file to open twice and causing
numerous issues.

Normally the file explorer wouldn't even load at all in this case but we
provide a file service for file:// URLs as a failsafe for certain files
that wouldn't load correctly in the past. These files load fine now
using the vscode-remote scheme, so I'm also removing that service.

Related: #1351.
Fixes #1294.