Live preview: automatically expand all formatting on current line

In live preview, markdown formatting is only expanded for the immediate segment of text that the cursor is inside.

This extremely granular level of showing/hiding formatting is usually more tedious than helpful.

In general, my attention occupies the line-level of my documents more than any other level of abstraction, and I suspect this may be the case for many other people.

Therefore, I suggest adding an option to always expand ALL formatting on the currently selected line.