fix(ui): Fix for rssi/snr

[danditomaso]

Description

This PR is a fix for a bug introduced in PR #963. If the RSSI/SNR infomation wasnt available the UI was displaying a 0 instead of the content. This PR fixes that bug that was introduced.

Related Issues

Fixes bug from PR#963

Changes Made

• Changed message.hops && to message.hops != null so that 0 won't render as text

• Improved readability: Extracted the complex conditional logic into a messageMetadata variable using clear if statements

• The JSX now just uses {messageMetadata} instead of nested && and || operators

  The logic is now clear and easy to follow:

  • If hops exists, show hops info
  • Otherwise, if SNR and RSSI exist, show that info
  • Otherwise, show nothing

Testing Done

Manual

Screenshots (if applicable)

BEFORE

AFTER:

Checklist

• Code follows project style guidelines
• Documentation has been updated or added
• Tests have been added or updated
• All i18n translation labels have been added (read
  CONTRIBUTING_I18N_DEVELOPER_GUIDE.md for more details)

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