Fix #3264, get rid of warnings

[freak5g]

issue 1:

issue 2:

Warning: Use the defaultValue or value props instead of setting children on <textarea>.
in textarea (created by CreateAccountPassword)

[sschiessl-bcp]

Generally, dangerouslySetInnerHTML is, well, dangerous. But since the input is controlled this is acceptable.

[freak5g]

I could split corresponding translation into three parts and format message in render function which works fine; or just remove any formatting at all and keep it simple. I've chosen dangerous approach encouraged by the law of precedent.