Assorted Event handler patches (#36171)

* EventHandler: rename functions & variables

* EventHandler: export event hydration to function

* EventHandler: rename variable

* EventHandler: simplify checks and make use of one variable

Move check of falsie delegated-selector, caused by tooltip.js

* EventHandler: more renaming

* Update event-handler.js

* bump bunldewatch

Co-authored-by: XhmikosR <xhmikosr@gmail.com>