This fixes the dictionary manager and various other places where a XUL
element was being created with createElement(), and also simplifies a lot
of createElementNS(HTML_NS, ...) calls.
This might cause some minor regressions but everything tested has
worked. Not touching preferences (#2659) or bindings.
Not working:
- Web tests (hidden browser is broken)
- Test Updated status text
- Various platform menu things (code copied from ZP and will use whichever
approach we settle on there)
- Use the "Chrome" theme
- Hide the gutter
- Don't highlight the active line
- Remove default iframe borders
- Focus the editor on window open
Ace instances (e.g., Scaffold) are now responsible for setting their own
theme (to avoid a flash of Monokai before a lighter theme appears).
- Use cookies from browser pane when running detectWeb or doWeb
- Use cookies from document when running or updating tests
This should fix various cases where translators can't be properly
developed or tested in Scaffold (e.g., [1]).
[1] https://github.com/zotero/translators/pull/2296#issuecomment-739116620
`nsIFilePicker::show()` is removed in Firefox 60 in favor of `open()`,
which takes a callback (and apparently has been preferred for a long
time).
There's no point switching to that, so this module is a version of
nsIFilePicker with an async `show()` that returns a promise and some
XPCOM-isms replaced (e.g., string paths instead of nsIFile).
