Feature #67: Advanced document template events

OnGenerated and OnImportAttachment allow advanced users to enter
expressions which will be evaluated whenever these document
template/importing events are triggered. This enables greater
automation.

Disco.Models/Repository/Device/DeviceProfile.cs

@@ -20,14 +20,14 @@ namespace Disco.Models.Repository
         [Required, StringLength(10)]
         public string ShortName { get; set; }
 
-        [StringLength(500)]
+        [StringLength(500), DataType(DataType.MultilineText)]
         public string Description { get; set; }
 
         public int? DefaultOrganisationAddress { get; set; }
 
         // Migration from DeviceProfile Configuration
         // 2012-06-14 G#
-        [Required]
+        [Required, DataType(DataType.MultilineText)]
         public string ComputerNameTemplate { get; set; }
         
         [Required]

Disco.Models/Repository/DocumentTemplate/DocumentTemplate.cs

@@ -18,8 +18,12 @@ namespace Disco.Models.Repository
         public string Description { get; set; }
         [Required, StringLength(6)]
         public string Scope { get; set; }
-        [StringLength(250), DataType(DataType.MultilineText)]
+        [DataType(DataType.MultilineText)]
         public string FilterExpression { get; set; }
+        [DataType(DataType.MultilineText)]
+        public string OnGenerateExpression { get; set; }
+        [DataType(DataType.MultilineText)]
+        public string OnImportAttachmentExpression { get; set; }
 
         // Feature Request 2012-05-10 by G#: https://disco.uservoice.com/forums/159707-feedback/suggestions/2811092-document-template-option-flatten-form-on-generate
         public bool FlattenForm { get; set; }