Split memos disappear #701

Steps to reproduce the behaviour

1. Click on transaction
2. Click on edit FAB button
3. Click on split icon
4. Add memo to 1 or more splits
5. Click "save"
6. Click "save" again
7. Click on edit FAB button
8. Click on split icon

Expected behaviour

Splits have their memos.

Actual behaviour

Split do not have their memos anymore.

Software specifications

• GnuCash Android version: 2.2.0
• System Android version: 6.0
• Device type: Any