Move property id resolving code for parser function into own class

the code for resolving PropertyId from the users input does
not belong in SnaksFinder!

resolving property id from a label *is* language-dependent, though,
so it should be a service provided to the LanguageAwareRenderer.

Change-Id: I52b69565e9b91c838a421cb4b6f6dadbd0967511
(hotfix) Moved snakview event handlers to statementview

Change-Id: Idd8dcfd663738fc0e876993caa82965a517ac4a9
Merge "(hotfix) Moved snakview event handlers to statementview"
Merge "Move property id resolving code for parser function into own class"