[Bug 887547] Display non-default date ranges for products on KB dashboard

* Same treatment for the details page
[Bug 789313] Long profile username breaks Messages folder layout
[Bug 884816] Fix flickering in the start page
[bug 884816] flickering in the start page
[bug 894932] Don't collect tweets for @firefox
Fix style of empty form on /search
[Bug 889272] Fix z-index of contrib tools.
Revert "[bug 894932] Don't collect tweets for @firefox"

This reverts commit 864acfde9a282a1c6586f1a29833ef9da1cb2811.
[bug 887374] Add noindex tag to some kb articles

Add the "robots" meta tag with "noindex" value to templates, canned
responses and administration KB articles