Code cleanup: Extracted methods, used ternary operator.

Jean-Noel Rouvignac

20.32.2015 ad85b8dfd8775fa342dcf6d0deaa380be53d080f

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relation.plugin.user-friendly-name=Wtyczka
user-friendly-name=\u015acie\u017cka Wtyczek
relation.plugin.user-friendly-plural-name=Wtyczki