Highlight unread message from notifications link

Adjusts the urls output by flow notifications to include
?fromnotif=1.  When the flow-board javascript sees the
fromnotif=1 along with #flow-post-rx09uq09wure it will
give a minimal highlight to the selected post and all posts
newer than the selected post.

There are two vector specific stylings that I don't know what to
do with, one is the color of the highlight.  The card wasn't clear
so i made it the same color blue as bluelinks so its not a new color.
The other vector specific thing is a media query for 982px, this is
needed to get the top level highlight to line up with the sidebar.

Change-Id: I3a00f25718059403ea3c6fe6eaf66c90e31fd336