feat(errors): add reset credentials button to error page

views/error.pug

@@ -7,6 +7,7 @@ block content
     .error
       h1 #{translate('somethingWentWrongLabel', currentLocale.code)} (#{error.status})
       p #{error.message}
+
       h2 #{translate('tryLabel', currentLocale.code)}:
       ul
         case error.status
@@ -23,10 +24,17 @@ block content
 
         if error.stack
           li #{translate('stackTraceErrorLabel', currentLocale.code)}
+
+      if helpers.isCustomCredentials(settings)
+        form(action='/settings?reset=true' method='POST')
+          p
+            button(type="submit") #{translate('resetCredentialsLabel', currentLocale.code)}
+
       if error.response
         h2 #{translate('errorLabel', currentLocale.code)}
         pre.error__stack-trace
           code.shell #{helpers.dump(error.response.data)}
+
       if error.stack
         h2 #{translate('stackTraceLabel', currentLocale.code)}
         pre.error__stack-trace