Update CKEditor library to 4.5.9

It also solves #2702171: [upstream] CKEditor's Moono skin does not respect the CKEditor cache-busting query string when loading its icons sprite. :)

Thanks! This looks great. Manually tested, works just like before.

This should also be committed to Drupal 8.1.x because it fixes #2702171: [upstream] CKEditor's Moono skin does not respect the CKEditor cache-busting query string when loading its icons sprite, which means that any site currently still on Drupal 8.0 that upgrades to 8.1 won't experience that WTF anymore.

I've rebuilt ckeditor using build.sh and the patch I get is not the same. Steps I took to build ckeditor...

1. git clone https://github.com/ckeditor/ckeditor-dev
2. git co 4.5.9
3. copied build-config.js from Drupal's vendor/assets/ckeditor to dev/builder
4. Ran sh build.sh -s from dev/builder
5. Copied ckeditor folder over Drupal's vendor/assets/ckeditor

Given this is minified JS we need to be careful about what we add - how come this generates a different patch from #3?

@thpoul - yep I think you're right and it doesn't look like there is any of setting the timestamp during the build process.

I've pinged the CKEditor team to gather feedback.

You guys are absolutely correct, the timestamp is unique and is different for every build.

Alright, thanks for confirming :)

Committed 25628e3 and pushed to 8.1.x and 8.2.x. Thanks!

Committed to the 8.1.x since this was a ckeditor patch release for us too and it fixes #2702171: [upstream] CKEditor's Moono skin does not respect the CKEditor cache-busting query string when loading its icons sprite

Yay! Closed #2702171: [upstream] CKEditor's Moono skin does not respect the CKEditor cache-busting query string when loading its icons sprite because this fixed that, and unpostponed #2239419: Include CKEditor's AutoGrow plug-in. This will allow us to further improve the CKEditor experience in Drupal :)