[bisq-network/bisq] Fix input validation in create offer view (#5003)

[chimp1984]

<!--
   SUPPORT REQUESTS: This is for reporting bugs in the Bisq app.
   If you have a support request, please join #support on Bisq's
   Keybase team at https://keybase.io/team/Bisq
-->

### Description

Input validation would need some improvements in the create offer view. When changing currency of a multicurrnecy account of switching accounts there are plenty of issues. 


-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/bisq-network/bisq/issues/5003
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bisq.network/pipermail/bisq-github/attachments/20201225/4ea1b9ee/attachment.htm>