Improve line heights

visualizer/static/style.css

@@ -70,6 +70,10 @@ body.embedded #plotter {
   width: 100%;
 }
 
+#selections label {
+  line-height: 2;
+}
+
 select {
   appearance: none;
   background-color: white;
@@ -108,6 +112,7 @@ select:disabled {
 }
 
 #sources {
+  line-height: 1.5;
   margin: 0;
   padding: 0;
 }