Not writing the expression parsed PerceptEvent into STM

[toaomalkster]

Bug - it's not writing the PerceptEvent into STM:

STM Add:    MemoryEvent{179fc,1ms,0.500,{eventData:3 + ? = 8,eventType:TextRequestEvent}}
STM Add:    MemoryEvent{b0cdd,0ms,0.600,{eventData:true,eventType:StuckThoughtEvent}}

I think that should include

PerceptEvent{8ffb0,19ms,0.058,ref=0efb6,Equation#3b388[Number#a6fea(3) Operator#48bb5(+) ExpressionToken#6221f(?) EquationOperator#1c814(=) Number#0fb94(8)]}

Part of the problem is that I think I've missed a step:

1. Try to parse -> PerceptEvent with low priority due to parse errors
2. Try to evaluate -> Stuck.
3. Parser should see Stuck flag and upgrade the strength.
4. Now PerceptEvent becomes top and gets copied to STM.
5. Still nothing else happening -> Stuck, again.
6. Now try loading concept from LTM.

Originally posted by @toaomalkster in #6 (comment)