[bisq-network/bisq] add Right-to-Left support (#2774)

[TechMiX]

@ripcurlx Actually I can't test it. Because I'm not experiencing it on my Ubuntu machine:
![scrnshot](https://user-images.githubusercontent.com/1241343/56800811-2bdb7680-6831-11e9-98f1-702364c7afd9.png)
Could you please test it without applying this PR on your machine to see if it's related to font?

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