fix: Only subtract native cost if the native token is being transferred

[janjakubnanista]

Fixes #issue_number

Description

Test scenarios

Checklist:

• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have cleaned up the code in the areas my change touches
• [x] My changes generate no new warnings
• [ ] Any dependent changes have been merged and published in downstream modules
• [x] I have checked my code and corrected any misspellings
• [x] I have removed any unnecessary console messages
• [ ] I have included all english text to the translation file and/or created a new issue with the required translations for the currently supported languages
• [ ] I have tested for mobile functionality and responsiveness
• [ ] I have added appropriate test coverage

[netlify[bot]]

✅ Deploy Preview for telos-bridge ready!

Name	Link
🔨 Latest commit	08f13d32675d8d1c6985252587b2384cc1aa0ba5
🔍 Latest deploy log	https://app.netlify.com/sites/telos-bridge/deploys/6531920fdd6ec500089b3090
😎 Deploy Preview	https://deploy-preview-10--telos-bridge.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.