Added -webkit-line-clamp CSS property

[SebastianZ]

This patch adds the -webkit-line-clamp CSS property.

For the data I've checked https://caniuse.com/#feat=css-line-clamp and tested in the current versions of Chrome, IE, Edge, and Opera. In Firefox this got implemented in version 68, see bug 866102.

Sebastian

[queengooborg]

Just a couple of updates to the version numbers of certain browsers, and this looks good to go!

[SebastianZ]

Thank you for the feedback, @vinyldarkscratch! I've verified your suggestions with the versions listed on Wikipedia and you're right. So, I've incorporated all your changes.

[queengooborg]

Thanks for the changes, looking perfect now!

[connorshea]

@vinyldarkscratch @SebastianZ the property in this file is called -webkit-box-reflect :) I'll open a PR to fix it.

[SebastianZ]

@vinyldarkscratch @SebastianZ the property in this file is called -webkit-box-reflect :) I'll open a PR to fix it.

Sorry for the mistake and the late reply! And thank you, @connorshea, for fixing it!

Sebastian

[rabbit-roger]

CSS property -webkit-line-clamp doesn't work in iOS in Safari and Chrome browsers, nor in the desktop version of Safari when direction:rtl is added. That is, for right-to-left languages, the property only works in the desktop version of Chrome and Chrome for Android for both text directions.
A footnote should be made about partial support in these browsers.

[ddbeck]

@Mihkach You've commented on a rather old PR and this comment is not likely to be followed up on here. So that this information is not lost, please open a new issue using the data problem template. Thank you.