Basic optimizations, removed redundancies

[mattBrzezinski]

Optimized CSS properties, removed redundancies, added closing tags to
HTML tags (could cause potential bugs in web browsers)

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[mattBrzezinski]

I signed it!

[googlebot]

CLAs look good, thanks!

[damienmg]

This pull request is too long, does several things in one stuff (and contains typo). Such large / subject to discussion pull request should be submitted to gerrit (https://bazel-review.googlesource.com) so a complete review can be performed.

There are also guidelines to not change spacing or non-semantic change on line of code we don't change the semantic as it make it harder to follow the blaming annotation.