Fix svg alignment in foreign objects.

Fix links in spoilers opening when revealing.
Fix unread icon appearing for home.
Fix unreads not being acknowledged.

Add servers to MobX.

Add Channel object.

i18n invites page.
Polish the bans page.

Revert mobile change.
Messages: Add channel id matching.

Sidebar: Show home button on mobile.

Home Sidebar: Remove top bar.

Don't pass dispatcher in, just provide it globally.
Fix: Allow clicking through to profile from server sidebar.

Can now collapse server categories.
Client remembers collapse state, incl. advanced appearance settings.

- replaced many uses of `as any` with another more specific cast `as T`
- filled in missing typed for items that needed to be typed
  - new runtime code was added where necessary to satisfy the new types with comments
- added missing theme variable "sidebar-active" to the Theme variables
- forms using `react-hook-form` are now typechecked
- changed some instances of `target` into `currentTarget` while removing `as any` assertions

Re-design status context menu.

Add rounded corners to sidebar.