message: Prepare changelog for v0.14.7-rc.1
diff: +Changes in [0.14.7-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.14.7-rc.1) (2018-12-06)
  +===============================================================================================================
  +[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.14.6...v0.14.7-rc.1)
  +
  + * Suppress CORS errors in the 'failed to join room' dialog
  + [\#2306](https://github.com/matrix-org/matrix-react-sdk/pull/2306)
  + * Check if users exist before inviting them and communicate errors
  + [\#2317](https://github.com/matrix-org/matrix-react-sdk/pull/2317)
  + * Update from Weblate.
  + [\#2328](https://github.com/matrix-org/matrix-react-sdk/pull/2328)
  + * Allow group summary to load when /users fails
  + [\#2326](https://github.com/matrix-org/matrix-react-sdk/pull/2326)
  + * Show correct text if passphrase is skipped
  + [\#2324](https://github.com/matrix-org/matrix-react-sdk/pull/2324)
  + * Add password strength meter to backup creation UI
  + [\#2294](https://github.com/matrix-org/matrix-react-sdk/pull/2294)
  + * Check upload limits before trying to upload large files
  + [\#1876](https://github.com/matrix-org/matrix-react-sdk/pull/1876)
  + * Support .well-known discovery
  + [\#2227](https://github.com/matrix-org/matrix-react-sdk/pull/2227)
  + * Make create key backup dialog async
  + [\#2291](https://github.com/matrix-org/matrix-react-sdk/pull/2291)
  + * Forgot to enable continue button on download
  + [\#2288](https://github.com/matrix-org/matrix-react-sdk/pull/2288)
  + * Online incremental megolm backups (v2)
  + [\#2169](https://github.com/matrix-org/matrix-react-sdk/pull/2169)
  + * Add recovery key download button
  + [\#2284](https://github.com/matrix-org/matrix-react-sdk/pull/2284)
  + * Passphrase Support for e2e backups
  + [\#2283](https://github.com/matrix-org/matrix-react-sdk/pull/2283)
  + * Update async dialog interface to use promises
  + [\#2286](https://github.com/matrix-org/matrix-react-sdk/pull/2286)
  + * Support for m.login.sso
  + [\#2279](https://github.com/matrix-org/matrix-react-sdk/pull/2279)
  + * Added badge to non-autoplay GIFs
  + [\#2235](https://github.com/matrix-org/matrix-react-sdk/pull/2235)
  + * Improve terms auth flow
  + [\#2277](https://github.com/matrix-org/matrix-react-sdk/pull/2277)
  + * Handle crypto db version upgrade
  + [\#2282](https://github.com/matrix-org/matrix-react-sdk/pull/2282)
  +
  Changes in [0.14.6](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.14.6) (2018-11-22)
  =====================================================================================================
  [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.14.5...v0.14.6)
  