Fix IOU currency routes

[roryabraham]

Details

Just some broken routes – we were trying to go to /iou/split//currency, where the missing section is meant to be a reportID. However, in this case it's perfectly legitimate to not have a reportID, because we're creating a new bill split. So instead, we can fix this by going to /iou/split/:reportID/currency. It actually doesn't matter what's between split/ and /currency, as long as it's not empty. Just x seems to work as well.

Fixed Issues

$ #3920

Tests / QA Steps

1. Click on the big green FAB.
2. Select Split Bill
3. Click on the currency symbol in the "Split Bill" modal.
4. Verify that the currency selection page opens up.
5. Close the modal.
6. Click on the big green FAB.
7. Select Request Money
8. Click on the currency symbol in the "Request Money" modal.
9. Verify that the currency selection page opens up.

Tested On

• Web
• Mobile Web
• Desktop
• iOS
• Android

Screenshots

Web

CurrencyRouteWeb.mov

Mobile Web

CurrencyRouteMWeb.mov

Desktop

CurrencyModalDesktop.mov

iOS

IOUCurrencyIOS.mov

Android

[OSBotify]

⚠️ ⚠️ Heads up! This pull request has the CP Staging label. ⚠️ ⚠️
Merging it will cause it to be immediately deployed to staging, even if the open StagingDeployCash deploy checklist is locked.

[roryabraham]

This PR was CP'd in 1.0.76-1. The normal deploy comment wasn't posted here, seemingly due to a random network error.

[isagoico]

@roryabraham Should go ahead and test this PR?

[roryabraham]

Yep, it's on staging. Go ahead and test it please 🙇

[roryabraham]

Actually @isagoico I already tested this and closed the linked issue. I'm going to check this off the deploy checklist.

[OSBotify]

🚀 Deployed to production in version: 1.0.77-5🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅