Thumbnail memory management needs improving

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Currently, Fauxbar saves thumbnail image data for the top 25-50 frecency-scored 
sites the user visits, so that auto-selected tiles have nice thumbnails from 
the get go. Fauxbar's keeps these at the ready in its background memory.

Really ought to only have the currently chosen number of auto-selected tiles be 
stored in memory, and no more than that (rows x columns).

And, when user has chosen to manually select tiles themselves, only need to 
have the tiles that they've selected be stored in memory. Anything more than 
that is a waste.

This defect is wasting 10-15MB of memory.

Original issue reported on code.google.com by fauxbar....@gmail.com on 30 Jul 2011 at 10:20

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Original comment by fauxbar....@gmail.com on 31 Jul 2011 at 9:40

• Changed state: Started

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Original comment by fauxbar....@gmail.com on 31 Jul 2011 at 10:40

• Changed state: Fixed

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Original comment by fauxbar....@gmail.com on 18 Aug 2011 at 12:50

• Added labels: Version1