Address feedbacks

[tungmhoang]

Summary

Addressed some feedbacks for new docs site.

Related PRs, issues, or features (optional)

• https://kobiton.atlassian.net/browse/KOB-39436: http://10.2.7.208/devices/manage-devices
• https://kobiton.atlassian.net/browse/KOB-39419: http://10.2.7.208/automation-testing/basic-appium-server/launch-a-basic-appium-2-session#_check_the_current_appium_server_version
• https://kobiton.atlassian.net/browse/KOB-39305: http://10.2.7.208/automation-testing/scripting/auto-generate-an-appium-script#_supported_languages_and_test_frameworks
• https://kobiton.atlassian.net/browse/KOB-39139: http://10.2.7.208/manual-testing/start-a-mixed-session

Metadata

• [ ] Adds new file(s)
• [x] Edits existing file(s)
• [x] Removes file(s)

PR contributor checklist

• [x] My PR follows the Kobiton Docs contributor guidelines, meaning:

  • My content contains correct spelling and grammar.
  • My directories and files are named and structured correctly.
  • My style and voice follows the Microsoft Style Guide.
  • I added all new pages to their section's nav.adoc file.
  • I removed all localizations (like en-us) from my URLs.