show workspace names instead of 'eval' in backtrace

show workspace names instead of 'eval' in backtrace

Error: undefined method `live_loo' for #<SonicPiSpiderUser1:0x2b6d910>
Workspace 1:10:in `block in __spider_eval'
C:/Users/JWeatherford/Desktop/sonic-pi/app/server/sonicpi/lib/sonicpi/spider.rb:365:in `eval'
C:/Users/JWeatherford/Desktop/sonic-pi/app/server/sonicpi/lib/sonicpi/spider.rb:365:in `block in __spider_eval'