test: DM list should scroll to reveal hidden items during navigation with up/down arrow keys

data/test-cases/channels/messaging/MM-Pending.md

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+---
+# (Required) Ensure all values are filled up
+name: "Navigating DM list using Up/Down arrow keys scrolls it"
+status: Active
+priority: Normal
+folder: Messaging
+authors: "@Victor-Nyagudi"
+team_ownership: []
+priority_p1_to_p4: P2 - Core Functions (Do core functions work?)
+
+# (Optional)
+location: Messaging
+component: null
+tags: []
+labels: []
+tested_by_contributor: ''
+
+# (Optional) Test type and tools
+cypress: in Production
+detox: N/A
+mmctl: N/A
+playwright: N/A
+rainforest: []
+manual_test_environments: []
+
+# Do not change
+id: null
+key: null
+created_on: null
+last_updated: null
+case_hashed: null
+steps_hashed: null
+---
+
+**Step 1**
+
+1. Click the "+" next to the "Direct Messages" category header in the LHS to open the DM list modal.
+2. Ensure there are enough list items such that you'll need to scroll to see the rest.
+3. Press the down arrow key to navigate through items to an item out of view.
+4. Press the up arrow key to navigate back up to an item out of view.
+
+**Expected**
+
+The DM list scrolls to reveal the hidden items in step 3 and 4.