Cloud Sync: Add further options to Account tab

[ChrisNZL]

To address recent reports of iCloud sync failing, and even sometimes Steam Cloud failing, I feel it is worth embellishing the Account tab with a "Cloud Sync" sub-category. Will also give the player more explicit control over their cloud sync status.

Ideas / tasks:

• [ ] Create a CloudSync category as a sub-category within the Account tab.
• [ ] Add option to have cloud sync happen automatically or not.
• [ ] Create new item action to upload files to the cloud.
• [ ] Create new item action to download files from the cloud.
• [ ] Add option to sync Achievement progress explicitly. (related issue: #1097)
• [x] Create modal Alerts when uploading or downloading explicitly.
• [ ] Add option to log chat messages (when romping through a dungeon) for when cloud sync happens.
• [ ] Create a new small UI Canvas container (near top of screen) for saved games / cloud sync / leaderboard upload or download progress indicators, so player knows when things are happening.

For the Cloud Sync category, allow the right panel to:

• [ ] Show all files (SavedGames, Account, Options, etc) with info:
  • [ ] File name
  • [ ] File size
  • [ ] Sync status (local only, syncable, synced, or out of date potentially)

If a file system imposes a limit (such as iCloud's 1 MB limit):

• [ ] Allow user to choose which file(s) to sync.

Deleting:

• [ ] Allow user to delete specific files.

Related issues:

• iCloud: Key-value storage is inadequate #1082
• iCloud / Game Center: Syncing issues? #1097

[ChrisNZL]

With issue #1097 being fixed in 0.3.7... I will revisit adding additional options above later on. Main issue was an actual bug of syncing not happening properly during startup.

User can at least force a manual sync for now.

The rest of the ideas can come later.

[ChrisNZL]

Don't think this is an issue anymore.

Was mainly an issue with iCloud.

But iCloud for saved games was removed in a recent version, due to saved game file sizes exceeding iCloud's Key-Value storage limits, and no first-party iCloud Document support exists for Unity (reliably anyway).