added Keep Selected button to console, map view, topic view

app/views/main/console.html.erb

@@ -7,6 +7,7 @@
   #%>
   <div class="headertop">
     <button onclick="hideSelectedEdges();hideSelectedNodes();">Hide Selected</button>
+    <button onclick="enterKeyHandler();">Keep Selected</button>
     <% if authenticated? %>
       <button onclick="var r=confirm('Are you sure you want to permanently delete selected objects?!'); if (r == true) {deleteSelectedEdges();deleteSelectedNodes();}">Permanently Delete Selected</button>
       <button onclick="saveToMap();">Save to Map</button>      

app/views/maps/show.html.erb

@@ -9,6 +9,7 @@
     <button onclick="if (!goRealtime) { this.innerHTML = 'Stop Realtime'; } else if (goRealtime) { this.innerHTML = 'Start Realtime'; } goRealtime = !goRealtime;">Start Realtime</button>
     <% end %>
     <button onclick="hideSelectedEdges();hideSelectedNodes();">Hide Selected</button>
+    <button onclick="enterKeyPressed();">Keep Selected</button>
     <% if authenticated? %>
       <% if (@map.permission == "commons" && authenticated?) || @map.user == user %>
         <button onclick="removeSelectedEdges();removeSelectedNodes();">Remove Selected From Map</button>

app/views/topics/show.html.erb

@@ -15,6 +15,7 @@
   #%>
 
 <div class="headertop">
+  <button onclick="enterKeyPressed();">Keep Selected</button>
   <% if authenticated? %>
     <button onclick="saveToMap();">Save to Map</button>
   <% end %>