Replace node definition string-based lookups with DefinitionIdentifier instances (#3451)

* create definition identifier and integrate it

* Bug fixes and code review

* formatting

* Fix migrations

* Fix remove handles migration

* formatting

* Fix test

* Fix tests 2

* fix deserialization

* Code review

* Small fixes

* Consolidate 'Morph' node migrations

* Add old SamplePointsNode name to migrations list

* Fix tests

* Unrelated small fix

* Fix migration crashes

* Fix tests

* Final code review

* fmt

* Add metadata

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

frontend/src/components/widgets/WidgetTable.svelte

@@ -24,7 +24,7 @@
 	</tbody>
 </table>
 
-<style lang="scss">
+<style lang="scss" global>
 	table:not(.unstyled) {
 		background: var(--color-3-darkgray);
 		border: none;

frontend/src/components/widgets/labels/ShortcutLabel.svelte

@@ -120,6 +120,8 @@
 
 <style lang="scss" global>
 	.shortcut-label {
+		align-items: center;
+
 		.key-label {
 			display: flex;
 			align-items: center;