NIFI-85: Made the Configure Processor modal dialog box movable.

Signed-off-by: Matt Gilman <matt.c.gilman@gmail.com>

nar-bundles/framework-bundle/framework/web/nifi-web-ui/src/main/webapp/js/nf/canvas/nf-processor-configuration.js

@@ -426,6 +426,8 @@ nf.ProcessorConfiguration = (function () {
                         $('#processor-configuration').removeData('processorHistory');
                     }
                 }
+            }).draggable({
+                handle: ".modal-header"
             });
 
             // initialize the bulletin combo