Keep selected block quotes when creating block quotes

[wheelercj]

Stardown's "Copy markdown of selection" option doesn't keep selected block quotes with the setting "when creating markdown of a selection, create a block quote and a page title link".

For example, the selection shown in this photo:

results in this markdown:

The rendered output looks like this:

Dorothy followed her through many of the beautiful rooms in her castle.

— Basic Syntax | Markdown Guide

but should give this result:

The rendered output looks like this:

Dorothy followed her through many of the beautiful rooms in her castle.

— Basic Syntax | Markdown Guide