Add inline category selection (#541)

* Implement inline category selection

* Add turbo frame to refresh updated transaction

* Improve styles

* Fix category assignment

* Reorganize code

* Revert event propagation

* Remove unused frames

* Make only the transaction name clickable

* Add custom scrollbar class

app/javascript/controllers/modal_controller.js

@@ -8,7 +8,7 @@ export default class extends Controller {
   }
 
   // Hide the dialog when the user clicks outside of it
-  click_outside(e) {
+  clickOutside(e) {
     if (e.target === this.element) {
       this.element.close();
     }