Add InitError(error, details) overload

This is only used in the current PR to avoid ugly
`strprintf(Untranslated("%s:\n%s"), str, MakeUnorderedList(details)`
boilerplate in init code. But in the future the function could be extended and
more widely used to include more details in GUI error messages or display them
in a more readable way, see code comment.

src/node/interface_ui.h

@@ -116,7 +116,7 @@ void InitWarning(const bilingual_str& str);
 
 /** Show error message **/
 bool InitError(const bilingual_str& str);
-constexpr auto AbortError = InitError;
+bool InitError(const bilingual_str& str, const std::vector<std::string>& details);
 
 extern CClientUIInterface uiInterface;