Render empty Text elements as empty lines instead of discarding.

Change-Id: I342d10840af48f1659594c90914dcfa77f0382f3
diff --git a/client/css/style.css b/client/css/style.css
index 56536a2..7cb6f74 100644
--- a/client/css/style.css
+++ b/client/css/style.css
@@ -90,6 +90,7 @@
 
 .de-text {
 	white-space: pre-wrap;
+	min-height: 1em;
 }
 
 .de-section, .de-shader-program, .de-shader, .de-egl-config-set, .de-build-info, .de-image-set {