Border when embedded since 2022.11.0

[julienlarivee]

Checklist:

• [x] I updated to the latest version available
• [x] I cleared the cache of my browser

Release with the issue: V0.4

Last working release (if known): Worked before installing HA 2022.11.0

Browser and Operating System: Chrome

Description of problem: When the card is embedded in an entities card, there is a border around the flipdown timer card. Before HA 2022.11.0, there was no border.

type: entities
entities:
  - entity: climate.air_climatise
    group: true
    type: custom:mini-climate
  - entity: timer.air_climatise
    type: custom:flipdown-timer-card

If we look at the same entities, but with native HA cards, there is still no border in 2022.11.0

type: entities
entities:
  - entity: climate.air_climatise
  - entity: timer.air_climatise

Also, the time picker card had the same issue, but they fixed it. Here is the link to it if it can help: https://github.com/GeorgeSG/lovelace-time-picker-card/issues/43