35607: roachtest: Renenable SQLSmith roachtest r=BramGruneir a=BramGruneir

Note that this is the original roachtest and not the re-written one.  If we find
that this one does not find any different issues, we should remove it entirely.
But there is no harm in enabling it right now.

Release note: None

35623: storage: enable follower_reads by default r=ajwerner a=ajwerner

This PR enables storage level follower reads by default. Follower reads still
will not be used for request routing without an enterprise license.

Release note: None

35645: sql/sqlbase: fix TestEncDatumSize under go1.12 r=knz a=petermattis

Fixes #35636.

golang/go@bfc54bb
reduced the memory usage of small big integers which in turn reduced the
`EncDatum.Size()` for the decimal datum used in this test.

Release note: None

35652: ui: remove monospace font for human-readable job description r=celiala a=celiala

In #35439, we introduced a user-friendly message (instead of the
exact SQL statement) for automatic table stats.

This commit uses the default font for that message, reserving
the monospace font for just SQL text.

cc @rolandcrosby @piyush-singh

![image](https://user-images.githubusercontent.com/3051672/54228134-e27cd500-44d7-11e9-8272-70da6ca7315c.png)


35654: roachtest: two easy changefeed test fixes r=nvanbenschoten a=danhhz

See commits for details

Co-authored-by: Bram Gruneir <bram@cockroachlabs.com>
Co-authored-by: Andrew Werner <ajwerner@cockroachlabs.com>
Co-authored-by: Peter Mattis <petermattis@gmail.com>
Co-authored-by: Celia La <celia@cockroachlabs.com>
Co-authored-by: Daniel Harrison <daniel.harrison@gmail.com>