message: Prepare changelog for v0.10.3-rc.1
diff: +Changes in [0.10.3-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.10.3-rc.1) (2017-09-01)
  +===============================================================================================================
  +[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.10.2...v0.10.3-rc.1)
  +
  + * Fix room change sometimes being very slow
  + [\#1354](https://github.com/matrix-org/matrix-react-sdk/pull/1354)
  + * apply shouldHideEvent fn to onRoomTimeline for RoomStatusBar
  + [\#1346](https://github.com/matrix-org/matrix-react-sdk/pull/1346)
  + * text4event widget modified, used to show widget added each time.
  + [\#1345](https://github.com/matrix-org/matrix-react-sdk/pull/1345)
  + * separate concepts of showing and managing RRs to fix regression
  + [\#1352](https://github.com/matrix-org/matrix-react-sdk/pull/1352)
  + * Make staging widgets work with live and vice versa.
  + [\#1350](https://github.com/matrix-org/matrix-react-sdk/pull/1350)
  + * Avoid breaking /sync with uncaught exceptions
  + [\#1349](https://github.com/matrix-org/matrix-react-sdk/pull/1349)
  + * we need to pass whether it is an invite RoomSubList explicitly (i18n)
  + [\#1343](https://github.com/matrix-org/matrix-react-sdk/pull/1343)
  + * Percent encoding isn't a valid thing within _t
  + [\#1348](https://github.com/matrix-org/matrix-react-sdk/pull/1348)
  + * Fix spurious notifications
  + [\#1339](https://github.com/matrix-org/matrix-react-sdk/pull/1339)
  + * Unbreak password reset with a non-default HS
  + [\#1347](https://github.com/matrix-org/matrix-react-sdk/pull/1347)
  + * Remove unnecessary 'load' on notif audio element
  + [\#1341](https://github.com/matrix-org/matrix-react-sdk/pull/1341)
  + * _tJsx returns a React Object, the sub fn must return a React Object
  + [\#1340](https://github.com/matrix-org/matrix-react-sdk/pull/1340)
  + * Fix deprecation warning about promise.defer()
  + [\#1292](https://github.com/matrix-org/matrix-react-sdk/pull/1292)
  + * Fix click to insert completion
  + [\#1331](https://github.com/matrix-org/matrix-react-sdk/pull/1331)
  +
  Changes in [0.10.2](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.10.2) (2017-08-24)
  =====================================================================================================
  [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.10.1...v0.10.2)
  