Admin home page 128

[Pacodastre]

This is what the new page looks like (style could be greatly improved here).

Some notes about this PR:

• I refactored the sources table into its own component and modified it to add it to this page. Note that the table on the admin home page doesn't have edit/delete actions.
• I added a new function on the file system providers fsStats which returns file system info for the base directory in the configuration of that provider.
• The tooltip on the pie chart doesn't work properly. This is due to the fact that the component uses absolute/relative positioning for the link in the bottom right of the tile. I tried playing with the values a bit, but couldn't get it working properly. So either the tooltip will need to work differently, or the absolute/relative positioning needs to be removed from the tile component.
• the pie chart svg uses absolute coordinates (rather than relative coordinates). I don't think it matters, but just wanted to point it out.
• I still need to do a little bit of refactoring.

Here's what the sources page looks like now:

Let me know what you want me to improve.

Fixes #128

[Pacodastre]

Screenshot above after making some style changes

[Pacodastre]

I added cache invalidation on signup/signin, which I forgot to do before.

[Pacodastre]

This is what it looks like on the latest commit

Few details about the implementation:
Game sizes are cached 2 different ways:

• gameid -> combined versions size
• gameid -> versionName -> version size
  Sizes are recalculated when:
• a game version is imported
• a game version is deleted
• a game is deleted

User count and activeUserCount are stored in the cache as well.
Their values are recalculated when:

• a user is registered
• a user is deleted
• a client is revoked
• a user signs in