change main dashboard layout

src/app/pages/dashboard/dashboard.html

@@ -1,18 +1,16 @@
 <pie-charts></pie-charts>
 
-<div>
-  <blur-panel class-container="user-stats-panel">
-    <div class="row">
-      <div class="col-md-6">
-        <h3 class="panel-title">Acquisition Channels</h3>
-        <traffic-chart></traffic-chart>
-      </div>
-      <div class="col-md-6">
-        <h3 class="panel-title">Users by Country</h3>
-        <am-chart-map></am-chart-map>
-      </div>
-    </div>
-  </blur-panel>
+<div class="row">
+  <div class="col-md-7 col-sm-12">
+    <blur-panel title="Acquisition Channels" class-container="medium-panel">
+      <traffic-chart></traffic-chart>
+    </blur-panel>
+  </div>
+  <div class="col-md-5 col-sm-12">
+    <blur-panel title="Users by Country" class-container="medium-panel">
+      <am-chart-map></am-chart-map>
+    </blur-panel>
+  </div>
 </div>
 
 <div class="row">