Audio player should be fixed to bottom

[iamonuwa]

Describe the bug
A clear and concise description of what the bug is.
The audio player div position should be fixed to the bottom. At the moment, if no data or not enough content is served, the audio player div breaks its position

To Reproduce
Steps to reproduce the behavior:

1. Load the app
2. On your code, (if you are using the mock data, reduce the content size or don't serve at all)
3. Reload the app
4. See the new position of the player

Expected behavior
A clear and concise description of what you expected to happen.
The audio player position should be fixed to the bottom at all times.

Screenshots
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Web (please complete the following information):

• OS: [e.g. iOS] Linux (Ubuntu 18)
• Browser [e.g. chrome, safari] Chromium
• Version [e.g. 22] 69.0.3497.81 (Official Build)

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.