Cleanup/refactor the ApplicationResources* files

• Most of the resources are not used anymore, but were left there for older versions of the skin
• Some strings make no sense in a language with a different topic, like Japanese, where the verb is after the object.
• When most of the resources were added, there was no support for {0}
  {1}

  ... placeholders, so the easiest thing to do was to just translate portions of the string, around the variables

• There are still many strings which are not bundled in the resource file
• There are some discrepancies between the ApplicationResources.properties and the ApplicationResources_en.properties files, which means that some of the strings in ApplicationResources.properties are replaced by another variant

So, what needs to be done:
1. ApplicationResources_en.properties must be merged back into ApplicationResources.properties and removed, so that future conflicts/overrides are eliminated
2. The whole skin files / wiki documents in the default database must be re-internationalized, making use of the

placeholders
3. The same thing should be done for the other two versions of the skin in the trunk