tweak browser bug list order so Safari bugs are contiguous
tweak browser bug list order so Chrome bugs are contiguous
Add grunt-contrib-compress.

Now, the zip file is created when running `grunt prep-release`.

[ci skip]
Update glob.
Merge pull request #15293 from twbs/grunt-contrib-compress

Add grunt-contrib-compress.
Tie help block to input with aria-describedby
Merge pull request #15330 from patrickhlauke/customizer-variables-help-block

Tie help block to input with aria-describedby