refine OpenType feature names

src/features/cv06-r.fea

@@ -1,4 +1,4 @@
-cvParameters { FeatUILabelNameID { name "Lower case R with curved tail"; }; };
+cvParameters { FeatUILabelNameID { name "r with curved tail"; }; };
 sub r by r.1;
 sub rrthook by rrthook.1;
 sub uni024D by uni024D.1;

src/features/cv08-i-serif.fea

@@ -1,4 +1,4 @@
-cvParameters { FeatUILabelNameID { name "Upper case i with serif"; }; };
+cvParameters { FeatUILabelNameID { name "Upper-case i with serif"; }; };
 sub I by I.1;
 sub Idieresis by Idieresis.1;
 sub Idieresisacute by Idieresisacute.1;

src/features/cv09-three.fea

@@ -1,4 +1,4 @@
-cvParameters { FeatUILabelNameID { name "Flat top three"; }; };
+cvParameters { FeatUILabelNameID { name "Flat-top three"; }; };
 sub three by three.1;
 sub three.tf by three.1.tf;
 sub three.squared by three.1.squared;

src/features/cv11-single-storey-a.fea

@@ -1,4 +1,4 @@
-cvParameters { FeatUILabelNameID { name "Single storey a"; }; };
+cvParameters { FeatUILabelNameID { name "Single-storey a"; }; };
 sub a by a.1;
 sub aacute by aacute.1;
 sub abreve by abreve.1;

src/features/ss03-r-curve.fea

@@ -1,4 +1,4 @@
-featureNames { name "Lower case r curves into round neighbors"; };
+featureNames { name "r curves into round neighbors"; };
 # curved "r" when it meets a curved shape, e.g. "ro"
 @straight_r = [
   r