Add support for fullscreen graphs (#29)

Author: sjanuary

dashboard/src/main/webapp/index.html

@@ -36,18 +36,18 @@
 
     <div class="container-fluid">
         <div class="row">
-            <div class="col-md-6" id="httpDiv1"></div>
-            <div class="col-md-3" id="httpDiv2"></div>
-            <div class="col-md-3" id="httpDiv3"></div>
+            <div class="col-md-6 hideable" id="httpDiv1"></div>
+            <div class="col-md-3 hideable" id="httpDiv2"></div>
+            <div class="col-md-3 hideable" id="httpDiv3"></div>
         </div>
 
         <div class="row">
-            <div class="col-md-4" id="cpuDiv1"></div>
-            <div class="col-md-4" id="gcDiv1"></div>
-            <div class="col-md-4" id="envDiv"></div>        
+            <div class="col-md-4 hideable" id="cpuDiv1"></div>
+            <div class="col-md-4 hideable" id="gcDiv1"></div>
+            <div class="col-md-4 hideable" id="envDiv"></div>        
         </div>
         <div class="row">
-            <div class="col-md-6" id="memPoolsDiv"></div>
+            <div class="col-md-6 hideable" id="memPoolsDiv"></div>
         </div>
     </div>