happy bmo push day!

[Dave Lawrence]

the following changes have been pushed to bugzilla.mozilla.org:

(tag: https://github.com/mozilla-bteam/bmo/tree/release-20200401.1)

https://bugzil.la/1621662 : Remove option for using Vagrant for BMO development and support Docker as primary method
https://bugzil.la/1621160 : First row of stagger column headers will be hidden when table header becomes sticky
https://bugzil.la/1621278 : Make bug IDs on search results proper bug links
https://bugzil.la/1622956 : Update contact emails and URLs
https://bugzil.la/1344094 : Add a link to a wiki.mozilla.org page describing how to request a keyword
https://bugzil.la/1623727 : Graphviz needs to be installed in bmo-slim base container to allow showdependencygraph.cgi to work properly
https://bugzil.la/849902 : my dashboard should be able to refresh on its own
https://bugzil.la/1370492 : "Assigned to you" in My dashboard should show bugs priority
https://bugzil.la/1183759 : keyword suggestions should not show keywords which have been already selected
https://bugzil.la/1410994 : Add utility for mass-disabling stale accounts