Minor: Background around pop-up does not adjust to iOS system theme (dark/light mode)

[Nazze]

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Describe the bug
When iOS changes from dark to light (or from light to dark) mode, the dashboard requires a refresh. Otherwise the background remains in old mode. See Screenshots.

To Reproduce
Steps to reproduce the behavior:

1. iOS is in dark mode
2. Open a pop-up
3. See the background around the pop-up is dark
4. iOS changes to light mode
5. The background around the pop-up is still dark
6. Refresh the dashboard
7. The background around the pop-up is light now

Expected behavior
The background around a pop-up should adjust to the system mode

Screenshots
Before refresh (wrong)

After refresh (right)

YAML
If applicable, add any relevant YAML code.

Your code here

Informations (please complete the following information):

• OS: iOS 17.5.1
• Browser/App: HA Companion app 2024.6
• Bubble Card version: 2.1.0-beta 1
• Home Assistant version: 2024.6.4

Additional context
Add any other context about the problem here.

Thank you! 🍻