ONOS-4359: continued work on theming UI
- updated xClose glyph
- replace double with single quotes in glyphData.js
- fixed close button on AppView details panel

Change-Id: I1e9139d096bdb4836710f019b5ee4e1c3c6e69e5
(cherry picked from commit 1fc873b)
diff --git a/web/gui/src/main/webapp/app/view/app/app.js b/web/gui/src/main/webapp/app/view/app/app.js
index 84aed7c..be72230 100644
--- a/web/gui/src/main/webapp/app/view/app/app.js
+++ b/web/gui/src/main/webapp/app/view/app/app.js
@@ -84,8 +84,7 @@
     }
 
     function addCloseBtn(div) {
-        is.loadEmbeddedIcon(div, 'plus', 30);
-        div.select('g').attr('transform', 'translate(25, 0) rotate(45)');
+        is.loadEmbeddedIcon(div, 'close', 26);
         div.on('click', closePanel);
     }