Importing a seedphrase only imports the first derived account

name: Bug Report
about: Using AlphaWallet, but it's not working as you expect?

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**Describe the bug**
When importing a seed phrase, only the first account of the derivation tree is imported.

**Steps to reproduce (REQUIRED)**

1. Import from a seed phrase (you can use `test test test test test test test test test test test junk`)
2. Check the imported account (should be `0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266`)
3. Add new wallet and check its seed phrase

**Expect**
4a. Both accounts should have the same seed phrase (`test test test test test test test test test test test junk`)

**Observed**
4b. The second account created has a different seed phrase than the one used in step 1 (not `test test test test test test test test test test test junk`)

**Screenshots**

**Version or build number number**
Version number: 3.61 (471)