Various changes and bugfixes

Fixed 'import failed' screen being shown while fixing conflicts
Updated link to duplicated contacts from import summary
Replace 'send pitch' and 'store coverage' on contact view page
Improve autosaving of pitch to pitch drafts
Prevent using custom sender addresses for Canceled trials
Fixed bug with save warning on newsroom boilerplate
Improved of recently uploaded images throughout Prezly
Fixed sender addresses dropdown overflow
Fixed case where Coverage preview image was not working
Add (Global) labels to global versions of multi-country locales: ar, de, es, fr, en, nl, pt
Hide region names in newsroom language switcher if possible
Fixed case where newsroom logo would be unset while changing look and feel settings
Various WCAG compliance fixes on newsrooms