min and default for engine number

IPython/frontend/html/notebook/static/js/clusterlist.js

@@ -103,8 +103,11 b' var IPython = (function (IPython) {'
         var profile_col = $('<span/>').addClass('profile_col').text(this.data.profile);
         var status_col = $('<span/>').addClass('status_col').html('stopped');
         var engines_col = $('<span/>').addClass('engines_col');
-        var input = $('<input/>').attr('type','number').
-                attr('size',3).addClass('engine_num_input');
+        var input = $('<input/>').attr('type','number')
+                .attr('min',1)
+                .attr('value',2)
+                .attr('size',3)
+                .addClass('engine_num_input');
         engines_col.append(input);
         var action_col = $('<span/>').addClass('action_col');
         var start_button = $('<button>Start</button>').button();