RagFair queries too demanding for lower end PCs. Default to Handbook prices

[Skwizzy]

A user has reported that the /client/ragfair/itemMarketPrice query is causing noticeable spikes in performance. A suggestion was made to use the Handbook values instead of the RagFair service which should be less demanding. An option to use rag fair prices for item comparison should be added to the mod settings

[Skwizzy]

Testing the fix in the 3.5.3 beta branch. Changed to use handbook values by default for weapon appraisal. We will now only make one query to get the Handbook prices per application session. This query will occur when the first bot initiates its looting cycle

[Skwizzy]

I have further refined this to use an existing instance of the Handbook singleton that gets created upon client start. No additional query needed for the default appraisal option! Change 72096bb

[Skwizzy]

Further improved ragfair option performance. Client will now only make one query when the game is first launched. Accessing these prices in raid is now as fast, if not faster than using the handbook