Feature-9082: Enhance language dropdown button

[nnhathung]

Fixes #9082

Short description of what this resolves:

• Enhance language dropdown button

Changes proposed in this pull request:

• Enhance language dropdown button

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the Upstream development branch.
• The acceptance, integration, unit tests and linter pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

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Name	Status	Preview	Comments	Updated (UTC)
open-event-frontend	❌ Failed (Inspect)			Aug 17, 2023 3:22pm

[cweitat]

@lthanhhieu able to show screenshot? thanks and also mark as ready for review if its done

[khangon]

Hi @norbusan , @mariobehling , @cweitat ,
We have completed ticket #9082
Please help me check and verify.
Thanks,

[mariobehling]

Tested it but it has some issues

• Clicking between channels sometimes plays the sound of the previous video
• Clicking between languages sometimes plays both audio channels

Reopening the issue. The previous implementation did not always work perfectly neither, but it never played two audio channels at the same time.