[Etoys] Many missing translations in POs

[korakurider at yahoo.co.jp]

Hello.
After switching translation dictionary from NLT to extracted POs, a few 
words don't have translation because those haven't been exported to POs.
Here are proposed fix (attached). 


(1) viewer category.
    for instance "collections" isn't translated.
    TransCategory-KR will fix this.

(2) symbols
    For instances, these aren't translated.
    - true/false on boolean readout
    - emptyScript on ScriptNameTile of "Scripting" category
    - all of SymbolListTile
    
    Unfortunately #translatedNoop isn't useful for this because current 
exporter implementation omits arrayed symbols.
    
    By transNoopAll-KR, all of string receiver of #translatedNoopAll
    including arrayed symbols will be exported. 
    (the patch has also test).
    
    By transSymbols-KR symbols in Vocabulary will be exported.
    

We switched translation engine very silently in development stream,
So folks may haven't recognized these degrade.  I think translation 
stuff needs more testing.

/Korakurider
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