NIFI-6126 - Change nf-canvas to respond to keyup events rather than keydown

This closes #3376

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

@@ -708,7 +708,7 @@
                         nfCommon.toggleScrollable(tabsContent.get(0));
                     });
                 }
-            }).on('keydown', function (evt) {
+            }).on('keyup', function (evt) {
                 // if a dialog is open, disable canvas shortcuts
                 if ($('.dialog').is(':visible') || $('#search-field').is(':focus')) {
                     return;