[bisq-network/bisq] Popmoney should have more validations (#3460)

[beingindot]

### Description

Popmoney should have more validations

#### Version

1.2.0
### Steps to reproduce

Select popmoney in account creation and enter space key in required fields

### Expected behaviour

should have some more validation

### Actual behaviour

able to add acct with space key

### Screenshots

![Screenshot from 2019-10-24 22-23-04](https://user-images.githubusercontent.com/55691179/67507665-07136f00-f6ad-11e9-9f40-9f19b45fd8ba.png)


#### Device or machine

Ubuntu



#### Additional info

<!-- Additional information useful for debugging (e.g. logs) -->


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https://github.com/bisq-network/bisq/issues/3460
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