Make flow temp graph parsing more robust
Make flow temp graph parsing more robust

It should try to get as much information from the string as possible, regardless of whether the string is correctly formatted or not. At many places it used to iterate through the characters indefinitely until the next separator was reached. Now it stops at the end of string and returns the information it gathered up to then.

Contributes to issue CURA-349.
totalretribution/CuraEngine,pratikshashroff/pcura,ROBO3D/CuraEngine,markwal/CuraEngine,markwal/CuraEngine,markwal/CuraEngine,Ultimaker/CuraEngine,pratikshashroff/pcura,ROBO3D/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,ROBO3D/CuraEngine,totalretribution/CuraEngine,alephobjects/CuraEngine,Ultimaker/CuraEngine,totalretribution/CuraEngine,alephobjects/CuraEngine