Weird behaviour when playing with indentation on list

[Artur Delura]

I'm not sure if it's bug but:

1. Open editor with no content
2. Create list by clicking adequate button
3. Play with "Increase indent", "Decrease Indent" buttons

Actual result: List is escaped when we reach indentation level 0, so everything works fine.

Now do this:

1. Open editor with no content
2. Increase "empty" content with "Increase Indent" button
3. Create list by clicking "Insert/Remove Ordered List"
4. Click "Decrease Indent"

Actual result: List is escaped, but wether it should surely? I think it should be escaped when indentation level reach 0.

[Piotr Jasiun]

I'm also not sure what is expected behavior. We should as some people if we did not do it before.

[Artur Delura]

Related: #11802

[Piotrek Koszuliński]

The confusion is caused by visual conflict between indentblock and indentlist. In step two of second TC you're adding margin. This margin is then inherited by the list item (actually I think that it should be inherited by ul/ol element, that's another thing). But when you click outdent in the <ul><li>^</li></ul> the outdentlist steps in. That's totally correct, because what was the last action you made? You created list. So first action of outdent is to remove that list.

[Piotrek Koszuliński]

PS. Listblock is a non-semantic plugin and that's why it makes this confusion. But it's enabled only in full preset. In standard preset the behaviour is totally clear.