fix: Update PortfolioView flag (#28446)

## **Description**

Provides a more descriptive feature flag name

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## **Related issues**

Fixes:

## **Manual testing steps**

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2.
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## **Screenshots/Recordings**

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## **Pre-merge author checklist**

- [ ] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask
Extension Coding
Standards](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/CODING_GUIDELINES.md).
- [ ] I've completed the PR template to the best of my ability
- [ ] I’ve included tests if applicable
- [ ] I’ve documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [ ] I’ve applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-extension/blob/develop/.github/guidelines/LABELING_GUIDELINES.md)).
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.

builds.yml

@@ -280,8 +280,8 @@ env:
   - BARAD_DUR: ''
   # Determines if feature flagged Chain permissions
   - CHAIN_PERMISSIONS: ''
-  # Determines if feature flagged Filter toggle
-  - FILTER_TOKENS_TOGGLE: ''
+  # Determines if Portfolio View UI should be shown
+  - PORTFOLIO_VIEW: ''
   # Enables use of test gas fee flow to debug gas fee estimation
   - TEST_GAS_FEE_FLOWS: false
   # Temporary mechanism to enable security alerts API prior to release

ui/components/app/assets/asset-list/asset-list-control-bar/asset-list-control-bar.tsx

@@ -78,7 +78,7 @@ const AssetListControlBar = ({ showTokensLinks }: AssetListControlBarProps) => {
           isFullScreen ? JustifyContent.flexStart : JustifyContent.spaceBetween
         }
       >
-        {process.env.FILTER_TOKENS_TOGGLE && (
+        {process.env.PORTFOLIO_VIEW && (
           <ButtonBase
             data-testid="sort-by-popover-toggle"
             className="asset-list-control-bar__button"