* replaced old images and gifs with new ones

* replaced images, changed some text especially for column styles

* replaced and added images and gifs

yarn requires correct node version in package.json
and wont install with 4.x. removing since we dont
care about it.

* ux: updated alert design

* fixed bg-color for alerts

* more changes to alerts, index fixed

closes #9220

fix: removed text option from text panel edit options, was by mistake not removed from settings dropdown, fixes #9204

* Prometheus: Fix actual step computation logic when a min_step is specified and the range is longer than min_step * 11000.

* Fix kbn.round_interval for exact intervals.

* Remove redundant 1d return, fix a couple of comments.

* Be more cautious with values close to 1d not rounding up to 1d. They may, because of the way the calculation uses 2 potentially different current time values.

When decrypting a source securejson byte array, should not
modify the source and now passes back a new dest byte array.