Migrate all attachments from IndexedDB to file system in the background (#2208, #2193, #2165, #2162, #2129) Save attachments to disk when importing Chrome app export (#2212)

New option in settings: delete all application data (https://github.com/signalapp/Signal-Desktop/commit/383e02edc4a7a055ac826a7d909e1099ebf5b959, #2144 and #2153)

Remove all configuration in database when we discover we are unlinked (https://github.com/signalapp/Signal-Desktop/commit/9acb189650ccd1494323a284cefc149ac35db880 and https://github.com/signalapp/Signal-Desktop/commit/1c6d91b59c2837ecd6ec3194fce508e7b85a6232)

Delete everything in database when we link with a different phone number from previous link (https://github.com/signalapp/Signal-Desktop/commit/9acb189650ccd1494323a284cefc149ac35db880)

Windows: Delete all data on uninstall (https://github.com/signalapp/Signal-Desktop/commit/c8555974e411981c0317ce091d1accf225238e69)

Fixed: Read receipts setting would not be synchronized along with re-link (#2218)

Fixed: Clicking conversation in left pane when already selected would remove focus on message composition field - thanks @colefranz! (#2032)

Fixed: Searching for the phone number of an existing contact, then selecting 'start conversation' would erase contact details (#2191)

Fixed: Selecting Settings menu option multiple times would open multiple instances of settings view - thanks @navdeepsinghkhalsa (#2167)

Dev: - Redact file paths in anything that goes to the log on disk (#2110) - When top-level process errors happen, don't show dialog with stack trace (#2110) - Add nsp to CI runs (https://github.com/signalapp/Signal-Desktop/commit/fd056e1b4cc1f08168ce7e831e4b635dd621f73e) - Add eslint-plugin-mocha to disallow exclusive tests using *.only (#2110) - Preparation for encrypted backups (https://github.com/signalapp/Signal-Desktop/commit/cea42bde7d3d36ae4794c7926bd96ce979f10082) - Updates to structure of exported data - messages.zip, flat list of attachments (https://github.com/signalapp/Signal-Desktop/commit/6d8f4b7b6e19db365eb395dbb33b1cf6f6154a8a) - Relax Node.js version requirements (#2203) - Fix a few typos in documentation - thanks @Vinnl (#2171) - Update issue template to mention that translation should be via Transifex (#2157)