Fix URL hints not showing
Fix for adobe/brackets#5426
Wait until all core extensions are loaded before loading user extensions.
This makes menu ordering more consistent, and fixes bug #5442 where the
order of registration matters.

Also change extension loading to work with arrays most of the time, avoiding
bugs if there are ","s in pathnames.

And fix stale comment in ExtensionManager.
Update 'de' locale for sprint 33
add placeholder button to css inline editor
Add addNewRuleToDocument() function
Add addAndSelectRange() function to MultiRangeInlineEditor
Add _addRule() to CSSInlineEditor
changing not.toBeNull to toBeTruthy
:
changing all not.ToBe(null) to toBeTruthy()
Fix require of Editor
collect list of stylesheets; set enabled state of New Rule button
fix merge conflict
Update CodeMirror to the latest
Ensure linting results update when a new linter is registered that might
affect the current file. Linters can register very late due to on-the-fly
Extension Manager installs.
Start of work to make inline editor show message when there are no rules. Mostly working, but header doesn't show in that case.
implement dropdown; hook up _addRule()
fix conflicts
Merge branch 'master' into css-quick-edit-new-selector
don't pass unused params; currently getting data via closure