[V2][iOS] Longpressing a TextInput in a modal bug

[ItsNoHax]

Issue Description

When you have a text input inside a modal and you long press it (to for example, edit a word) the native iOS zoom appears but the modal is invisible.

Steps to Reproduce / Code Snippets / Screenshots

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Environment

• React Native Navigation version: Build 2571
• React Native version: 0.56.0
• Platform(s) (iOS, Android, or both?): iOS
• Device info (Simulator/Device? OS version? Debug/Release?): All

[stale]

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