Add Bootstrap classes for clickable chapter rows
Add Bootstrap classes for clickable chapter rows

- https://getbootstrap.com/docs/4.4/utilities/stretched-link
- Fixes dita-ot/website#338

Signed-off-by: Roger Sheen <a61a1add71dadc74037ae5e44ee30713db9a7451@infotexture.net>

infotexture/docs,infotexture/docs,dita-ot/docs