Dropdown apply change is partially displayed outside the screen

[wkoot]

Describe the bug
The dropdown "apply change to X" is partially displayed outside the screen space.
When the column is on the left, the menu expands to the left, when the column is on the right, the menu expands to the right.
In both cases, part of the dropdown is not visible.

To Reproduce
Steps to reproduce the behaviour:

1. Open the metric source configuration
2. Click on 'Apply changes to source'
3. See error

Your environment (please complete the following information):

• OS: Windows
• Browser: Firefox
• Quality-time version: v5.16.1

Additional context
Perhaps related to, or to be fixed in, #9796