Merge pull request #366 from sortega/wtf

Workaround for the label-with-graphic javafx bug
Prevent non-random seed tokens in OKPay Mock
Merge pull request #367 from apoloval/task/hashed-tokens

Prevent non-random seed tokens in OKPay Mock
Fix graphic issues in wallet widget

The border was not well aligned.
Merge pull request #368 from apoloval/fix/wallet-widget

Fix graphic issues in wallet widget
Add an about dialog accessible from the Help menu bar

This dialog presents the current version of the product and the list of authors.
Merge pull request #369 from apoloval/task/about-dialog

Add an about dialog accessible from the Help menu bar