Use Mozilla's colors for itembox and tagbox background
This way, the colors play nicely with Windows themes (e.g. high contrast)
Re https://forums.zotero.org/discussion/38870/make-zotero-fully-recognize-windowsff-high-contrast-themes/ and https://twitter.com/stuffilike2know/status/504167872567189504
Merge pull request #531 from aurimasv/high-contrast

Use Mozilla's colors for itembox and tagbox background
Change cert error message URL to https://
Fix error handling for saveItems
Debugging for strange Zotero.getString() error
Update minVersion/maxVersion
Additional debugging for formatStringFromName error
Improve long-filename handling during syncing

This will hopefully fix some remaining issues with long filenames during
syncing, particularly on Linux with encrypted filenames (which have a
filename length of 143).

(This may have reintroduced some edge case bugs, so it needs some
testing.)
Ignore case when extracting extension in Zotero.File.createShortened()
Don't match extension in createShortened() for dot-files (.hidden)
Check ext length explicitly in createShortened when checking path length
Remove unnecessary var
Add localization todos
Don't log stack trace for getString() failure unless unexpected
Fix error from letter items with more than 10 recipients

https://forums.zotero.org/discussion/40218/
Convert additional for..in loops to for loops in getDisplayTitle()
Update versions
Update another version