Merge branch 'develop' into anoa/jitsi_ptt

* develop: (30 commits)
  [matrix] -> Matrix
  Nudge karma to 3.1.2
  set chrome path for travis CI explicitly
  Updated install spinner referenced in #8913
  Add support for localConfig at $appData/config.json. Move electron-config to $appData/electron-config.json
  Translated using Weblate (Hungarian)
  Update to electron 4.0.6
  Translated using Weblate (Spanish)
  Translated using Weblate (Norwegian Bokmål)
  Translated using Weblate (Hungarian)
  Translated using Weblate (Hindi)
  Translated using Weblate (Greek)
  Translated using Weblate (German)
  Translated using Weblate (Finnish)
  Translated using Weblate (Arabic)
  Translated using Weblate (Portuguese (Brazil))
  Translated using Weblate (Czech)
  Translated using Weblate (Swedish)
  Translated using Weblate (Swedish)
  Allow disabling update mechanism
  ...

package.json

@@ -115,7 +115,7 @@
     "fs-extra": "^0.30.0",
     "html-webpack-plugin": "^3.2.0",
     "json-loader": "^0.5.3",
-    "karma": "^3.1.1",
+    "karma": "^3.1.2",
     "karma-chrome-launcher": "^0.2.3",
     "karma-cli": "^1.0.1",
     "karma-junit-reporter": "^2.0.0",
@@ -152,7 +152,7 @@
   },
   "build": {
     "appId": "im.riot.app",
-    "electronVersion": "4.0.4",
+    "electronVersion": "4.0.6",
     "files": [
       "node_modules/**",
       "src/**",