Adjusting GUI table & details panes fonts to a slightly smaller size.

Fixed a number of issues with details panes; table embedding, etc.

Change-Id: I7c7ebf913f5755e385c32114e9f6a82f45997842
diff --git a/apps/yang-gui/src/main/resources/app/view/yangModel/yangModel.js b/apps/yang-gui/src/main/resources/app/view/yangModel/yangModel.js
index 42fa343..e35b8df 100644
--- a/apps/yang-gui/src/main/resources/app/view/yangModel/yangModel.js
+++ b/apps/yang-gui/src/main/resources/app/view/yangModel/yangModel.js
@@ -89,7 +89,7 @@
         top.append('hr');
 
         bottom = container.append('div').classed('bottom', true);
-        bottom.append('h2').text('YANG Source');
+        bottom.append('h3').text('YANG Source');
 
         srcFrame = bottom.append('div').classed('src-frame', true);
         srcDiv = srcFrame.append('div').classed('module-source', true);