[BUG] Background not being replaced fully.

[ItsRauf]

Issue: When taking code screenshots the container background is not fully replaced.

Steps to Reproduce:

1. Install Polacode
2. Start Polacode
3. Select code to take screenshot of
4. Observe

---

Extension Info:

Name: Polacode
Id: pnp.polacode
Description: 📸  Polaroid for your code
Version: 0.3.3
Publisher: P & P
VS Marketplace Link: https://marketplace.visualstudio.com/items?itemName=pnp.polacode

[octref]

Seems a regression by #121. I have reverted it and will make a new release.

@kufii fyi, I'll try to bring your changes in later.

[octref]

Should be fixed in 0.3.4.

[kufii]

@octref sorry about that, my next PR has that issue fixed, as well as the prior font family fix