Display conditions - Implemented expression tree creation

Display conditions - Use the most appropriate number input
UI general - Use current localisation for decimal seperators and enfore in inputs

src/Artemis.Core/Services/Interfaces/IDataModelService.cs

@@ -31,6 +31,12 @@ namespace Artemis.Core.Services.Interfaces
         /// <param name="plugin">Should be a module with a data model or a data model expansion</param>
         DataModel GetPluginDataModel(Plugin plugin);
 
+        /// <summary>
+        ///     If found, returns the data model of the provided plugin
+        /// </summary>
+        /// <param name="pluginGuid">Should be a module with a data model or a data model expansion</param>
+        DataModel GetPluginDataModelByGuid(Guid pluginGuid);
+
         /// <summary>
         ///     Determines whether the given plugin expands the main data model
         /// </summary>