* Move <kbn-dev-tools-app> Angular wrapper directive usage into route template
* Move sole directive into new directives folder
* WIP checkin: basic conversion to React components
* Fix sample custom patterns indentation
* Remove custom CSS
* Wrap button in EuiFormRow + define isSimulateDisabled
* Wire up simulate
* Cleanup
* Ace formatting options
* Better styling
* Adding spacing between custom patterns and simulate button
* Fixing form row widths
* Removing form row around button
* Add indentation/newlines in structured output
* Error handling
* Use constants
* Removing no-longer-used code
* Implement syntax highlighting via custom mode
* Making functional tests pass
* Adding trailing comma back
* Removing fixed heights
* Removing unnecessary styles
* Make Event Output form row full width as well
* Wrapping EuiCodeEditors in EuiPanels
* Adding spacer before callout; making spacing around callout consistent
* Clear out custom patterns from request if field is cleared out
* Clear out simulation results before attempting simulation
* Set state with untrimmed value
* Change pipeline editor markup so bottom border doesn't hide text on last line.
* Add constants for scroll margin size.
* Add comments to editor constants.
* Add PX units to constant names.
* Update to grok debugger editors: let them grow taller and stop hiding half of bottom line input.
* Update custom pattern size to 10 LOC.
* Remove unnecessary options, add constants for scroll margin.
* Encapsulate editor options in mutate function.
* Move editor helper file and prefer "function" declaration over ES6 const.
* Add test for new helper function.
