[bisq-network/bisq] CPU consumption skyrockets on create offer / take offer (#4649)

[Oscar Guindzberg]

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### Description

CPU consumption skyrockets on create offer / take offer. 

#### Version

<!-- commit id or version number -->
1.4.0

### Steps to reproduce

<!--if you can reliably reproduce the bug, list the steps here  -->
Option 1: Create offer
- Click "Create new offer to buy btc"
- Trading account: ETH...
- Enter any values
- Click next step

Option 2:Take offer
- Find an offer to sell btc (buy eth)
- Take the offer
- Click next

### Expected behaviour
CPU consumption at normal level.
<!--description of the expected behavior -->

### Actual behaviour
CPU consumption skyrockets. Computer performance is degraded. Java process uses 70% of the CPU.
Once I exit that screen, CPU consumption goes back to normal.
<!-- explain what happened instead of the expected behaviour -->

### Screenshots

<!--Screenshots if gui related, drag and drop to add to the issue -->

#### Device or machine
Mac OSX Catalina 
<!-- device/machine used, operating system -->

#### Additional info
Tested on regtest connected to a localhost bitcoin core
<!-- Additional information useful for debugging (e.g. logs) -->


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https://github.com/bisq-network/bisq/issues/4649
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