Shows a prompt once per restart or once per day, whichever is longer,
with an option to not show again for a month. Can be disabled completely
by setting extensions.zotero.showConnectorVersionWarning to false.
Currently prompts for connector versions below 5.0.35.
This is a temporary solution for #1489 until the connector checks and
warns on its own when it's outdated and most people are on a version
that does that (particularly Safari users, who don't auto-upgrade).
If somebody switched accounts in a previous version, it was apparently
possible for related items to end up pointing at an item URI with the
old userID, which could cause a 403 on sync.
https://forums.zotero.org/discussion/70989/report-id-477331252
(5.0 deletes data when switching accounts to avoid exactly this sort of
bug.)
TinyMCE triggers a focus on the window itself, which means that the
window steals focus when an attachment is created even if another Zotero
window is in front. Instead, do a manual focus in the external note
window, which is the one place I could find where we rely on it (though
there might be others).
These should've all been replaced with dc:replaces relations in a schema
update step, so any that exist were likely synced down from the API
(since fixed) and should be obsolete/redundant.
This also adds a mechanism for indicating that DB userdata upgrades
after a certain version are minor and shouldn't show "Upgrading
database…" or create a pre-upgrade backup.
(Even if it's generally a bad idea without hyphenation)
Also adds unused code that could replace the three alignment buttons in
the toolbar with a split-button menu with all four options. We could use
this if we needed more space and didn't think people would mind the
extra click when switching between left and center.
