This is basically a request to merge the functionality of https://www.drupal.org/project/views_content_cache into core views:
This module implements a views cache plugin that is aware of content and can provide caching for views, until the content in those views changes.
Drupal 8 Drupal 8 has this functionality essentially baked into core, so there isn't a need for this module if your site is running Drupal 8.
Recent comments
A simple way — use Field Group to create a container for fields https://backdropcms.org/project/field_group and CSS Flex оr Grid to alignment.
Layout also for /node/add/ forms?
Yes. The are several ways to do this: Install Mail System and select "Testing" for delivery in admin/config/system/mailsystem Install Maillog / Mail developer...
Prevent Backdrop from sending emails
The short answer is no, you can't theme forms or change their layouts through the UI. There is a ported version of Display Suite, which has a submodule called Display Suite Forms that allows you...
Layout also for /node/add/ forms?