Merge branch 'improvement/VersionHistoryIndex-all-sources' into develop

Previously, the `VersionHistoryIndex` only listed versions that were in the `Attributes` table. That should work fine so long as a `LastModified` and `LastModifiedBy` record is created, as is done by default in the OnTopic Editor. If those attributes are disabled, however, or the change is done programmatically, then updates that don't affect the `Attributes` table won't be reflected. To remedy this, the `VersionHistoryIndex` has been extended to additionally pull versions from `ExtendedAttributes`, `Relationships`, and `TopicReferences`. This resolves #78.

Author: JeremyCaney

OnTopic.Data.Sql.Database/Views/VersionHistoryIndex.sql

@@ -18,9 +18,31 @@ AS (
 	  PARTITION BY		TopicID
 	  ORDER BY		Version DESC
 	)
-  FROM	[dbo].[Attributes]
-  GROUP BY	TopicID,
+  FROM (
+    SELECT	TopicID,
 	Version
+    FROM	[dbo].[Attributes]
+    GROUP BY	TopicID,
+	Version
+    UNION
+    SELECT	TopicID,
+	Version
+    FROM	[dbo].[ExtendedAttributes]
+    GROUP BY	TopicID,
+	Version
+    UNION
+    SELECT	Source_TopicID AS TopicID,
+	Version
+    FROM	[dbo].[TopicReferences]
+    GROUP BY	Source_TopicID,
+	Version
+    UNION
+    SELECT	Source_TopicID AS TopicID,
+	Version
+    FROM	[dbo].[Relationships]
+    GROUP BY	Source_TopicID,
+	Version
+  ) AS	VersionList
 )
 SELECT	Versions.TopicId,
 	Version