DBC22-5926: Route save modal fixes from regression

[minORC]

📝 Submitter: Min Ji Choi

🔗 JIRA Ticket

• Ticket Link: https://moti-imb.atlassian.net/browse/DBC22-5926

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✅ Quality Assurance & Requirements

• Requirements Met: I have confirmed that all acceptance criteria from the JIRA ticket are fulfilled.
• Tested desktop in local or dev envs
• Tested mobile in local or dev envs
• Ran unit tests N/A
• SonarCloud: I have verified that the SonarCloud analysis is clean/passing for this branch.

⚙️ Configuration & Environment

• New Env Variables: Does this PR require new environment variables? No

  If yes, please list them here and ensure they are added to secret manager, the .env.example. and the Vault by an STA.

🧪 How to Test (if required)

1. Login to account
2. Enter a route search
3. Click on save to save the searched route
4. Verify that the save route modal is not hidden by the header and that the route nickname tooltip is styled correctly (see screenshot in ticket)

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🔍 Reviewer Checklist

• Reviewed code for logic and cleanliness
• Re-tested desktop/mobile in local or dev envs
• Verified no new console warnings/errors
• Confirmed that any new env variables are understood/documented