fix: show standard error message on project details page

In the PR #3335 the code was updated to show error details on the error page. But we have to show the standard error message.
Also, we have to show error 404 in case of error 403 because server throws error 403 if page is not found.

ref issue #3311

Author: maxceem

src/projects/detail/ProjectDetail.jsx

@@ -43,9 +43,11 @@ const showCoderBotIfError = (hasError) => {
         component = compose(
           withProps({code:403, message: messageGenerator})
         )
-      } else if (props.error && props.error.code  && props.error.msg) {
+      // server always returns 403 when page is not found or user doesn't have access,
+      // so 403 errors we don't customize and show `page404` instead
+      } else if (props.error && props.error.code && props.error.code !== 403) {
         component = compose(
-          withProps({code:props.error.code, message: props.error.msg})
+          withProps({ code:props.error.code })
         )
       }
       return hasError(props)