Initially tried to port the test to work on all OSes, relying on
HOME/END/PAGEUP/PAGEDOWN, but the behavior is not really consistent
(at least not on Linux). The shortcuts listed on MDN at
https://developer.mozilla.org/en-US/docs/Tools/Web_Console/Keyboard_shortcuts
seem a bit out of sync.
Not sure why we cannot use home/end/pageup/pagedown on all platforms here
but as it is not the purpose of this migration, I will leave that up for a
follow up.
MozReview-Commit-ID: DJbmYzYZUok
--HG--
rename : devtools/client/webconsole/new-console-output/test/mochitest/browser_webconsole_ctrl_key_nav.js => devtools/client/webconsole/new-console-output/test/mochitest/browser_jsterm_ctrl_key_nav.js
extra : rebase_source : fff90157354b435b541705a923f7d53c7a64c479