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 1fc873ba)

@@ -19,11 +19,11 @@
  */
 
 .light div.close-btn svg.embeddedIcon g.icon .glyph {
-    fill: #9fa296;
+    fill: #333333;
 }
 .dark div.close-btn svg.embeddedIcon g.icon .glyph {
     /* TODO: dark theme */
-    fill: #9fa296;
+    fill: #333333;
 }
 
 

@@ -55,8 +55,8 @@
 
 #application-details-panel .close-btn {
     position: absolute;
-    right: 10px;
-    top: 0;
+    right: 26px;
+    top: 26px;
     cursor: pointer;
 }
 

@@ -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);
     }