Fix appearance of bullets/numbered lists (the first level is slightly
indented to the right instead of right on the margin).
New golden files have been tested using Word 2010 on Windows 10.
This change will not have any effect with the default style.
However, it enables users to use a style (via a reference.docx)
that turns on row and/or column bands.
Closes#6371.
All headings now have a uniform color.
Level-1 headings no longer set `w:themeShade="B5"`.
Level-2 headings are now 14 point rather than 16 point.
Level-3 headings are now 12 point rather than 14 point.
Level-4 headings are italic rather than bold.
Closes#5820.
This commit prevents custom styles on divs and spans from overriding
styles on certain elements inside them, like headings, blockquotes,
and links. On those elements, the "native" style is required for the
element to display correctly. This change also allows nesting of
custom styles; in order to do so, it removes the default "Compact"
style applied to Plain blocks, except when inside a table.
