Fix implementation of repo Home func (#2601)

* Fix implementation of repo Home func

* Make fixture changes for testing

models/fixtures/repo_unit.yml

@@ -1,43 +1,43 @@
 -
   id: 1
   repo_id: 1
-  type: 1
-  index: 0
-  config: "{}"
-  created_unix: 946684810
-
--
-  id: 2
-  repo_id: 1
-  type: 2
-  index: 1
-  config: "{\"EnableTimetracker\":true,\"AllowOnlyContributorsToTrackTime\":true}"
-  created_unix: 946684810
-
--
-  id: 3
-  repo_id: 1
-  type: 3
-  index: 2
-  config: "{}"
-  created_unix: 946684810
-
--
-  id: 4
-  repo_id: 1
   type: 4
   index: 3
   config: "{}"
   created_unix: 946684810
 
 -
-  id: 5
+  id: 2
   repo_id: 1
   type: 5
   index: 4
   config: "{}"
   created_unix: 946684810
 
+-
+  id: 3
+  repo_id: 1
+  type: 1
+  index: 0
+  config: "{}"
+  created_unix: 946684810
+
+-
+  id: 4
+  repo_id: 1
+  type: 2
+  index: 1
+  config: "{\"EnableTimetracker\":true,\"AllowOnlyContributorsToTrackTime\":true}"
+  created_unix: 946684810
+
+-
+  id: 5
+  repo_id: 1
+  type: 3
+  index: 2
+  config: "{}"
+  created_unix: 946684810
+
 -
   id: 6
   repo_id: 3

models/unit.go

@@ -60,6 +60,14 @@ func (u *Unit) CanDisable() bool {
 	return true
 }
 
+// IsLessThan compares order of two units
+func (u Unit) IsLessThan(unit Unit) bool {
+	if (u.Type == UnitTypeExternalTracker || u.Type == UnitTypeExternalWiki) && unit.Type != UnitTypeExternalTracker && unit.Type != UnitTypeExternalWiki {
+		return false
+	}
+	return u.Idx < unit.Idx
+}
+
 // Enumerate all the units
 var (
 	UnitCode = Unit{