fix: use correct property name for redesign

[pnarayanaswamy]

Description

Fixes the bug where the ui_customization property does not show up in the metrics event. Also fixed the mapping such that the ui_customization property shows up for the eth_signTypedData as well.

Related issues

Fixes: #24578

Manual testing steps

1. Go to this page...

Screenshots/Recordings

Before

After

Pre-merge author checklist

• [x] I’ve followed MetaMask Coding Standards.
• [x] I've completed the PR template to the best of my ability
• [x] I’ve included tests if applicable
• [x] I’ve documented my code using JSDoc format if applicable
• [x] I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• [ ] I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• [ ] I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions[bot]]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[metamaskbot]

Builds ready [141a1fe]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8
  • content-script: 0
  • ui: 0, 1, 10, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1083 ± 539 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	69	177	103	32	15
		domContentLoaded	9	80	18	15	7
		load	56	2546	1083	1122	539
		domInteractive	9	80	18	15	7

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 57 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 67.37%. Comparing base (576670f) to head (141a1fe). Report is 1 commits behind head on develop.

:exclamation: Current head 141a1fe differs from pull request most recent head 31eb4ce

Please upload reports for the commit 31eb4ce to get more accurate results.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #24579 +/- ## ======================================== Coverage 67.37% 67.37% ======================================== Files 1289 1289 Lines 50219 50219 Branches 13005 13005 ======================================== Hits 33834 33834 Misses 16385 16385 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[metamaskbot]

Builds ready [31eb4ce]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8
  • content-script: 0
  • ui: 0, 1, 10, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (730 ± 490 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	63	130	89	20	10
		domContentLoaded	9	45	13	8	4
		load	49	2429	730	1019	490
		domInteractive	9	45	13	8	4

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: -18 Bytes (-0.00%)
• ui: 0 Bytes (0.00%)
• common: 89 Bytes (0.00%)