Fix onboarding modal & add re-open button (#129)

* Added a button to open the onboarding modal

* Fixed onboarding modal

* added a show-me-around getting-started menu button

app/javascript/glitch/locales/en.json

@@ -5,6 +5,7 @@
   "layout.desktop": "Desktop",
   "layout.mobile": "Mobile",
   "navigation_bar.app_settings": "App settings",
+  "getting_started.onboarding": "Show me around",
   "onboarding.page_one.federation": "{domain} is an 'instance' of Mastodon. Mastodon is a network of independent servers joining up to make one larger social network. We call these servers instances.",
   "onboarding.page_one.welcome": "Welcome to {domain}!",
   "onboarding.page_six.github": "{domain} runs on Glitchsoc. Glitchsoc is a friendly {fork} of {Mastodon}, and is compatible with any Mastodon instance or app. Glitchsoc is entirely free and open-source. You can report bugs, request features, or contribute to the code on {github}.",