Diaspora Native WebApp

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- Merged pull request from Scoute Dich (Thanks!): Added public activity link in side nav, progressbar instead of progress dialog.
- Fix: Hide floating action button on compose screen.
- Fix: Attach photos when opening compose screen when sharing content from another app.
- Fix: Error when searching hashtags and the user included the # symbol.
- Fix: Crashes on Splash and Pod screens.
- Clicking the app title goes to the main stream.