Fixed the reference to the message bundle for "looupMsg" invoker.
PMT refactoring and messages bundles

Refactored PMT to be more declarative and to make use of the message bundles. There are still factoring issues with the fluid.uiOptions.pmt component, but hopefully these will be addressed when complex panels are better supported in the preferences framework (FLUID-5131). Naming should also be re-evaluated after FLUID-5131.
Added German translations.
Merge remote-tracking branch 'jobara/chris-i18n' into i18n
Trying to implement language selection. No-go yet...