v1.2.0
v1.2.0

_Note: This release is equivalent to [v1.2.0-beta.2](https://github.com/WhisperSystems/Signal-Desktop/releases/tag/v1.2.0-beta.2). Listed below are the changes from the previous production release: [v1.1.0](https://github.com/WhisperSystems/Signal-Desktop/releases/tag/v1.1.0)_

Update to Electron 1.7.10 (#1919)

Fixed: clicking Windows notification would break window out of aero-snap location (#1918)

Fixed: forwarded video would not play (#1977)

Fixed: conversation was inaccessible if group member had invalid phone number (#1968)

Fixed: powershell warning caused cert validation of downloaded update to fail on windows (#1976)

Fixed: 'Missing signed prekey' errors after re-link (#1979)

Fixed: data older than three days would persist in logs dir (#1945)

Fixed: in the middle of send, disabled send field could be edited after click (#1937)

Update strings (#1921)

Add badge with unread count to the tray icon - thanks @m-pilia (#1934)
_Note:_ to try this test feature out, use the `--use-tray-icon` and `--start-in-tray` command-line arguments

Dev:
  - Additional logging for unexpected situations during sort of conversation list (#1969)
  - Dependency updates, fixes required for successful release (#1966 and #1976)
  - Log more info along with http errors (#1968)
  - Fix error to console when verifying contact in standalone mode (#1961)
  - Remove all built assets from repo (#1955)
  - Log out information from DOMException when import fails (#1923)
  - Log clearer messages regarding prekey/signed prekey fetches (#1961)
  - Make errors more debuggable; capture correct stack, include name (#1944)
  - Add eslint/mocha with code coverage for non-browser code (#1945)
  - Revamped github issue and pull request templates, updates to contributing.md/readme.md (#1955 and #1956)
  - Document building/testing releases in Contributing.md, thanks @veggiedefender (#1867)
  - Update a number of dependencies to the latest: builder, websocket, spellcheck (#1920)

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