Fixed backup issue in a specific task flow

For this task flow:

1. User selects "Continue Existing Form" (the existing one must have company info step filled)
2. In company info step, goes back to sign in step with invalid values in some fields (chooses "Leave")
3. Chooses "Start New Application"
4. In company info step, goes back to sign in step with invalid values in some fields (chooses "Leave")
5. Chooses "Continue Existing Form"

In step 5, user should see an empty form as the values should be reset to empty in step 4. But without the fix, user will see the values in step 1, as we don't reset the backup values when user chooses "Start New Application". So, in step 4, the values for reset are the ones in step 1.