diff --git a/client/project.ls b/client/project.ls
index d5477a0..0836cc1 100644
--- a/client/project.ls
+++ b/client/project.ls
@@ -15,15 +15,13 @@ deep-copy = (object) ->
 is-right-column = (task, column-id) ->
 	task.extra_properties && task.extra_properties.column && task.extra_properties.column == column-id
 
-has-column = (task) ->
-	task.extra_properties && task.extra_properties.column
-
 # configured column, but inexistant (maybe removed since)
 inexistant-column = (task, columns) ->
-	columns.filter((.id == task.extra_properties.column)).length == 0
+	! columns.find((.id == task.extra_properties.column))
 
 orphan-tasks = (tasks, columns) ->
-	tasks.filter (task) -> (! has-column) || inexistant-column task, columns
+	tasks.filter (task) ->
+		(! task.extra_properties?.column) || inexistant-column task, columns
 
 
 Project = (self, todod-ws, users-cache) ->
@@ -44,6 +42,18 @@ Project = (self, todod-ws, users-cache) ->
 			extra_properties: extra_properties
 		}
 
+	self.edit-column = (column) ->
+		extra_properties = deep-copy self.extra_properties
+		extra_properties.columns = extra_properties.columns.map (old-column) ->
+			if old-column.id == column.id
+				column
+			else
+				old-column
+
+		todod-ws.edit-list self.id, {
+			extra_properties: extra_properties
+		}
+
 	self.render-column = (column, first) ->
 
 		tasks-to-display = self.tasks.filter (task) -> is-right-column task, column.id
@@ -86,16 +96,7 @@ Project = (self, todod-ws, users-cache) ->
 									console.log "column update:", column
 									modal.visible := false
 
-									extra_properties = deep-copy(self.extra_properties)
-									extra_properties.columns = extra_properties.columns.map (old-column) ->
-										if old-column.id == column.id
-											column
-										else
-											old-column
-
-									todod-ws.edit-list self.id, {
-										extra_properties: extra_properties
-									}
+									self.edit-column column
 							}
 					} [
 						icon \cog