gerrit: polishing web UI

[David Ostrovsky]

Hi,

may be you've already heard about our new code review system site:
https://gerrit.libreoffice.org.

As you can see we have installed already LO logo in header.
Unfortunately there is only 200px and the next small one is 100px
too small (and it doesn't really play good enouph with "Code Review" 
default font).

Would it be possibe to create a 150 px Logo?
Or may be create a new one with combination of Logo & Code Review Slogan
with the same font (Vegur?) -- may be Code bold (as in Libre and Review 
not as in Office,
just my soughts). What about background, favicon, ...?

As a inspiration i place here some links how other projects customized it:

https://android-review.googlesource.com/#/q/status:open,n,z
https://git.eclipse.org/r/#/q/status:open,n,z
https://review.openstack.org/
http://codereview.scilab.org/
https://review.typo3.org

Thank you in advance for your help!
David