Inline close/open buttons also

Instead of using font-awesome.

Author: barryvdh

src/DebugBar/Resources/debugbar.css

@@ -125,14 +125,19 @@ a.phpdebugbar-tab.phpdebugbar-active {
     color: white;
   }
 
-a.phpdebugbar-close-btn .fa, a.phpdebugbar-open-btn .fa {
-    font-size: 16px;
-}
-a.phpdebugbar-restore-btn {
+a.phpdebugbar-close-btn, a.phpdebugbar-open-btn, a.phpdebugbar-restore-btn {
   width: 16px;
   height: 16px;
 }
 
+a.phpdebugbar-close-btn {
+  background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA4AAAAOCAYAAAAfSC3RAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAYdEVYdFNvZnR3YXJlAHBhaW50Lm5ldCA0LjAuM4zml1AAAADDSURBVDhPxZCxCsIwFEUzuGdwCvQD7BIIcehUXDqVfGM/wsG/iG4ifkzMlRuSPLo4eeFBue8c6Iv6b4wxW557Hs0KnWa3seqDxTiOyVqbhmF4UND4Rofdruyce3rvE6bIRSo9GOI1McbLPM/vVm4l7MAQr0kpHaQsJTDE+6zrepym6SVFdNgR69M+hBTLzWCI10gJvydvBkO8ZlmWayvhJnkzGOI1+fBTCOHWPkT7YNiBId4HizxnCKy+r81uX/otSn0A7dioI/vYX+8AAAAASUVORK5CYII=) no-repeat 9px 6px;
+}
+
+a.phpdebugbar-open-btn {
+  background: url(data:image/png;base64,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) no-repeat 8px 6px;
+}
+
 .phpdebugbar-indicator {
   position: relative;
   cursor: pointer;

src/DebugBar/Resources/debugbar.js

@@ -485,7 +485,7 @@ if (typeof(PhpDebugBar) == 'undefined') {
             });
 
             // minimize button
-            this.$closebtn = $('<a href="/service/javascript:"><i class="fa fa-times"></i></a>').addClass(csscls('close-btn')).appendTo(this.$headerRight);
+            this.$closebtn = $('<a href="/service/javascript:" />').addClass(csscls('close-btn')).appendTo(this.$headerRight);
             this.$closebtn.click(function() {
                 self.close();
             });
@@ -497,7 +497,7 @@ if (typeof(PhpDebugBar) == 'undefined') {
             });
 
             // open button
-            this.$openbtn = $('<a href="/service/javascript:"><i class="fa fa-folder-open"></i></a>').addClass(csscls('open-btn')).appendTo(this.$headerRight).hide();
+            this.$openbtn = $('<a href="/service/javascript:" />').addClass(csscls('open-btn')).appendTo(this.$headerRight).hide();
             this.$openbtn.click(function() {
                 self.openHandler.show(function(id, dataset) {
                     self.addDataSet(dataset, id, "(opened)");