Double request to sprite image files when timestamp enabled

[tobiasz.cudnik]

Double request to sprite image files when timestamp enabled. Example:

http://nightly.ckeditor.com/5829/skins/kama/icons.png?t=A7M74HW
http://nightly.ckeditor.com/5829/skins/kama/icons.png

This should be handled in releaser, which should update CSS files with correct timestamp.

Question: What if user disabled timestamp in config ? We can ship 2 versions of each CSS file to handle this. Alternatively, we can inject CSS rule dynamically, but this seems to be much less stable.

[fredck]

Considering that the timestamp is used by default, we should have it by default in the CSS as well.

I think that having two sets of CSS files just for this is too much. Having the timestamp hardcoded would not break things. So, we could at least leave it documented that manual changes to the CSS files are needed to avoid timestamp on some image requests.

[j.swiderski]

I was not able to reproduce this in latest CKEditor 3.x and CKEditor 4.x.