Make annotation action links and privacy note text readable

The annotation action links were too small to be easily
legible, as was the 'This annotation will be visible to ...' label.

This sets the size of 'small' text to $body1-font-size which is
the smallest legible size for text in the app.

h/static/styles/common.scss

@@ -60,7 +60,7 @@ html {
 }
 
 .small {
-  font-size: .8em;
+  font-size: $body1-font-size;
 }
 
 //Candidate for cleanup