Use 'max-height' (vs. fixed 'height') to allow partially collapsed quotes
Existing customizations using 'height' need to be adjusted appropriately.
Suggested user customization:
/* Partially reveal first level collapsed quotes */
body.mailview blockquote[type="cite"]:not([qctoggled="true"]) {
max-height: 6.6em !important;
}
/* Always have nested collapsed quotes reveal just one line of text */
body.mailview blockquote[type="cite"]:not([qctoggled="true"])
blockquote[type="cite"]:not([qctoggled="true"]) {
max-height: 1.2em !important;
}