Closes https://github.com/webstudio-is/webstudio/issues/3149
## Description
As a user when I have Heading, Text or similar instances selected which
have a single text node instance, I expect an added component to insert
AFTER such instances.
## Steps for reproduction
1. add heading
2. select heading instance
3. 1-click box
4. see box was added after the heading
5. repeat the same with paste
6. repeat the same with any instance that has only text inside
## Code Review
- [ ] hi @TrySound , I need you to do
- conceptual review (architecture, feature-correctness)
- detailed review (read every line)
- [ ] hi @johnsicili , I need you to do
- test it on preview
## Before requesting a review
- [ ] made a self-review
- [ ] added inline comments where things may be not obvious (the "why",
not "what")
## Before merging
- [ ] tested locally and on preview environment (preview dev login:
5de6)
- [ ] updated [test
cases](https://github.com/webstudio-is/webstudio/blob/main/apps/builder/docs/test-cases.md)
document
- [ ] added tests
- [ ] if any new env variables are added, added them to `.env.example`
and the `builder/env-check.js` if mandatory
Oleg Isonen
700c9b95ab