[Create] Filter out control-less properties

When properties have no control defined, don't show them
in the create dialog (but do show them in metadata, e.g.
info bubble.) For nasa/openmctweb#92

platform/commonUI/browse/src/creation/CreateWizard.js

@@ -77,6 +77,9 @@ define(
                     row.key = index;
 
                     return row;
+                }).filter(function (row) {
+                    // Only show rows which have defined controls
+                    return row && row.control;
                 })
             });
 

platform/commonUI/browse/test/creation/CreateWizardSpec.js

@@ -42,7 +42,9 @@ define(
                     "property" + name,
                     [ "getDefinition", "getValue", "setValue" ]
                 );
-                mockProperty.getDefinition.andReturn({});
+                mockProperty.getDefinition.andReturn({
+                    control: "textfield"
+                });
                 mockProperty.getValue.andReturn(name);
                 return mockProperty;
             }