Leave empty lines when collapsing

[Inetov]

I think it's a good idea to leave blank lines when collapsing blocks in the editor.
Not intentionally adding, but simply not hiding empty lines following each other. In my opinion, if the user added them, then he needs them)

now it looks like this:

˅ title of task 1
line 1
line 2


˅ title of task 1
...

collapsed:

> title of task 1
> title of task 1

my suggestion (collapsed):

> title of task 1


> title of task 1

because there were two empty lines.