Fix for #194
Fix for #194

This puts background tabs at 10% polling speed rather than stopping
completely. I may make this a setting next, but this should fix many app
pools with default configurations dying and stale data for long
durations after that happens.

GABeech/Opserver,jeddytier4/Opserver,manesiotise/Opserver,GABeech/Opserver,mqbk/Opserver,manesiotise/Opserver,geffzhang/Opserver,opserver/Opserver,jeddytier4/Opserver,mqbk/Opserver,geffzhang/Opserver,opserver/Opserver,opserver/Opserver,manesiotise/Opserver,rducom/Opserver,rducom/Opserver