ref #7163: restructure preferences and externalize strings in preferences

ref #7849: disable apply button until something was changed in preference page

ref #7849: harmonize admin and local preferences for distribution editor and use drop down instead of radio buttons

ref #7268 Implement own extension point for preferences

Conflicts:¶

eu.etaxonomy.taxeditor.workbench/fragment.e4xmi¶

ref #6190 removing svn property place holder in first line of code - java files

#5335 Use new getLanguageByLabel methof in term service

Renamed classes to match the new order in PreferenceMenu