UI Dropdown Menu Overlaps or Malfunctions During Scrolling on Branch/Tags Selection

[KosFM]

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Bug

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When navigating across files in the application, there's a feature to switch between branches or tags via a dropdown menu. This functionality is disrupted when scrolling through the page, causing the dropdown UI to either overlap, malfunction, or become unresponsive. This issue leads to a poor user experience, as the dropdown does not behave as expected during page scroll interactions.

Steps to Reproduce:

1. Navigate to any file in the application.
2. Click the branch/tags selection button to open the dropdown.
3. Attempt to scroll around the page while the dropdown is open.
4. Observe the dropdown's behavior during scrolling.

Expected Behavior:
The dropdown should remain functional and correctly positioned while the user scrolls through the page, without overlap or malfunction.

A demonstration of the problem can be viewed in this video:

NOTE: It demonstrated on github/choosealicense.com repo

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