[Behavior] Adding an checkbox item above a checked item

[lebigot]

When you have a checkbox list item and want to simply add another one on top, we can put the cursor just after the checkbox and press enter: a new, empty checkbox item appears on top:

• |Existing line

becomes

• |
• Existing line

(where | represents the text cursor).

Now, obsidian-outliner currently has some unexpected and arguably unwanted behavior when the original checkbox is checked:

• |Checked line

becomes

• |
• Checked line

The original box becomes unchecked, which is obviously not what the user wanted. Also the new, untouched item is checked, which is also somewhat unexpected (a new task, for example, is probably not checked).

I would therefore like to suggest that inserting a new checkbox item by pressing enter instead maintain the checked status set by the user:

• |
• Checked line