Fix #3372. Check for valid server. Small refactoring to live dev startup to create live document before agents load.
Merge branch 'master' into jasonsanjose/issue-3372
update live dev highlighting unit tests
Spanish strings for sprint 23
code review comments
fix #3394. clear out old request filters.
Merge pull request #3392 from adobe/jasonsanjose/issue-3372

Fix #3372 check for valid server
Missing spanish strings sprint 23
Consistent translation for 'language' in spanish
Cleaner fix for #2761 (Project tree selection incorrect after opening file
by means other than sidebar) - Clear selection in project tree if current
document not exposed in tree anywhere.

Backs out pull #2869, which made the behavior of Find in Files inconsistent
with other means of opening and didn't fix other cases of the bug.

Adds unit tests for several of these edge cases.
Merge pull request #3398 from adobe/pflynn/fix-2761

Cleaner fix for #2761 (Project tree selection incorrect after opening file by means other than sidebar)
safe fix for #3403. only support live preview for known subset of HTML document extensions.
Merge pull request #3408 from adobe/jasonsanjose/issue-3403

Only support live preview for known subset of HTML document extensions.
update getting started quick-edit.png for en and fr to show updated toolbar UI
Merge pull request #3393 from adobe/jbalsas/spanish-loc-sprint23

Spanish strings for sprint 23
Merge pull request #3409 from adobe/jasonsanjose/quick-edit-png

update getting started quick-edit.png for en and fr to show updated toolbar UI
Fixes the Quick Open integration test (#2696).

Note that I did sometimes see failures, but these appeared to be
genuine failures (as in the scroll position was not correct in the
window on screen).
Fix exception when _noMatchCache contains the 'hasOwnProperty' property
Make the test more resilient with a wider band.

Rather than +/- 1 on the offset, use 40%-60% of the height.
remove extraneous comment.