Set some sane limits on the disk cache for people who forget.

[garrettmoon]

No description provided.

[ghost]

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[appleguy]

This is a great improvement - most users will either set a default directly (including 0 if they want that), or otherwise this default should serve them reasonably well for both relatively large and small storage cases.

[sjtupt]

why add limit to disk cache? And 50M is too little for disk cache?

[garrettmoon]

@sjtupt We decided to set a default limit because Apple shows caches in the settings screen for how much space an app is using. So with no limit this can surprise some users as to why an app is using up so much disk space. You can always set a higher or infinite limit for your app!