Appendix headings style fixes

[ascott1]

This addresses two tiny bits of weirdness found in the styles.

(1) <h4>s in the slide down interp content were rendered with a little icon.

Before:

Now:

(2) Markers in the Appendices had a funky line height when next to a key-term.

Before:

Now:

Review

@grapesmoker or @willbarton

[grapesmoker]

yase