fix: currency preferences toggle not displayed

[salimtb]

Description

when the user goes to settings to change the primary currency symbol, the native token symbol is not displayed correctly ( see photo below )

Manual testing steps

1. go to the develop branch
2. go to settings
3. find the primary currency symbol
4. fiat is displayed correctly as long as the native token symbol is not displayed

Screenshots/Recordings

Before

After

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[salimtb]

after changes on the controller , nativeCurrency is removed from state.metamask.
it was replaced everywhere with the ticker value got from providerConfig ( e.g: getNativeCurrency function ) but it seems to have been forgotten to replace it at this level too.
and this is why we have this bug

[metamaskbot]

Builds ready [5cc1a21]

• 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
  • common: 0, 1, 2, 3, 4, 5, 6
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (521 ± 302 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	88	151	119	22	10
		domContentLoaded	67	143	101	19	9
		load	80	1577	521	630	302
		domInteractive	67	143	101	19	9

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 9 Bytes (0.00%)
• common: 0 Bytes (0.00%)