css linted: selector performance improvement

I linted the css files with cssLint and adjusted the selectors to make them faster. I tested the changed stylesheet and I think we got some performance improvement. I was pretty radical, so I can't say for sure that I didn't broke anything, but everything looked fine to me.
plus menu fix
WhatsApp version update to 2.11.452 - Activation SMS work now
Merge pull request #594 from gargsms/WhatsApp-Version-Update

WhatsApp version update to 2.11.452 - Activation SMS work now
Merge pull request #593 from TitanNano/csslint

 css linted: selector performance improvement
Update to WA 2.11.453
Merge pull request #595 from loqui/wa-2.11.453

Update to WA 2.11.453
Fix #596
Merge pull request #597 from aesedepece/dev

Fix #596
Better emoji UX
Merge pull request #599 from aesedepece/emoji-UX

Better emoji UX
Revert #588 because of being not protocol-agnostic, sorry.
Merge pull request #601 from aesedepece/revert-588

Revert #588 because of being not protocol-agnostic, sorry.
This is v0.3.4a. Let's push it to Marketplace!!!