added possible iOS double tab fix

[AndyOGo]

Fixes #385 .

Changes proposed in this pull request:

• Fixes iOS double tab issue for :hover

I hope this CSS-Solution will work, another reliable fix would be using tap events implemented by #290

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Tested the Expandable Container at local axa.ch mock server at browserstack on:

• iPhones and iPad from iOS 7+ up to 11
• Edge 16, 14, IE 11
• Lastest and random desktop browsers at windows, macOS
• Android 5, 7 Samsung Galaxies

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[AndyOGo]

@LucaMele
@TheDadi
@sventschui
It would be possible to target these styles only at ios devices (though it's a big list of media queries...) 🤔
http://stephen.io/mediaqueries/

Better list for iOS devices:
https://css-tricks.com/snippets/css/media-queries-for-standard-devices/

Excluding iOS:
https://jeffclayton.wordpress.com/2014/07/28/css-hack-anything-but-ios/

[AndyOGo]

And computation of decimal pixel values should be tested:
http://cruft.io/posts/percentage-calculations-in-ie/

[AndyOGo]

@LucaMele
@TheDadi
@sventschui
According to my manual browserstack tests, decimal point rounding does not seem to be an issue :)

[LucaMele]

I will run few tests and then ok :)

[AndyOGo]

@LucaMele
Guess this should actually be a hotfix, merged directly into master?

If so, we would need to do it manually now. And may add a hotfix feature to our release script.

[LucaMele]

When is the plan for develop merge?

[LucaMele]

but yes it might be better to treat it as HF and add it to the release