1.0.0beta2u2 (final check)

[alicerunsonfedora]

This PR makes the following changes to Hyperspace:

• Changes the login function in the emergency mode from createHyperspaceApp to Mastodon.registerApp (pulled from @gopherdonapp/app).
• Fixes the createHyperspaceApp function so that when it calls the createApp function, it passes the base URL from the parameters (required to make an app on the server with base URL) (fixes [Bug] Client authentication malformed errors #8, noted by @GidiKroon).
• Fixes the bug where the app crashes when clicking "Load more posts" on a profile with no posts (fixes [Bug] Load more button on profile with no posts crashes #13).
• Makes avatars in applicable areas clickable, redirecting to the profile page of an account.
• Adds a 'View profile' button as an action in a notification (fixes [Enhancement request] Add 'View profile' button to follow notifications #15).
• Changes the default profile icon to AssignmentIndIcon for consistency.
• Adds streaming to notification page so new notifications are loaded in while on the page (fixes [Enhancement request] Stream notifications on notification page #19)
• Adds a reply button to notifications that are of the type mention (eg. messages, replies to existing posts, new posts with a mention, etc.)
• Fixes bug where boosting/unboosting a post doesn't update its state
• updates version to 1.0.0beta2u2

[Nomad1556]

LGTM