bug: sign / verify fields cleared on swipe
**Describe the bug**
Fields are cleared when swiping beteeen screens

**To Reproduce**
Steps to reproduce the behavior:
1. Input data into sign msg fields
2. swipe to the verify screen
3. return to sign screen
4. fields are cleared

**Expected behavior**
fields shouldnt be cleared

**Screenshots**
N/a

**Platform:**
 - OS: android
 - Device: android
 - Cake Wallet Version: 1.16.4
