chore: align dev preview env with stable (#939)

Author: mchappell

apps/browser-extension-wallet/.env.developerpreview

@@ -24,9 +24,16 @@ USE_ADA_HANDLE=false
 USE_DATA_CHECK=false
 USE_POSTHOG_ANALYTICS=true
 USE_COMBINED_PASSWORD_NAME_STEP_COMPONENT=false
-USE_MULTI_DELEGATION_STAKING_ACTIVITY=false
+# TODO Remove redundant feature flags when Trezor and Ledger are supported (https://input-output.atlassian.net/browse/LW-9480)
+USE_MULTI_DELEGATION_STAKING_LEDGER=false
+USE_MULTI_DELEGATION_STAKING_TREZOR=false
+USE_MULTI_DELEGATION_STAKING_ACTIVITY=true
+USE_MULTI_DELEGATION_STAKING_GRID_VIEW=false
+USE_ROS_STAKING_COLUMN=false
 
 USE_POSTHOG_ANALYTICS_FOR_OPTED_OUT=false
+USE_MULTI_WALLET=false
+USE_SHARED_WALLET=false
 
 # In App URLs
 CATALYST_GOOGLE_PLAY_URL=https://play.google.com/store/apps/details?id=io.iohk.vitvoting
@@ -72,6 +79,7 @@ CEXPLORER_URL_SANCHONET=https://sancho.cexplorer.io
 ADA_HANDLE_URL_MAINNET=https://api.handle.me
 ADA_HANDLE_URL_PREVIEW=https://preview.api.handle.me
 ADA_HANDLE_URL_PREPROD=https://preprod.api.handle.me
+ADA_HANDLE_URL_SANCHONET=
 
 # Manifest.json
 LACE_EXTENSION_KEY=djcdfchkaijggdjokfomholkalbffgil