Flush project before getting all project labels

services/web/app/coffee/Features/Labels/LabelsHandler.coffee

@@ -8,16 +8,16 @@ module.exports = LabelsHandler =
 		/\\label\{([^\}\n\\]{0,80})\}/g
 
 	getAllLabelsForProject: (projectId, callback=(err, projectLabels)->) ->
-		ProjectEntityHandler.getAllDocs projectId, (err, docs) ->
+		DocumentUpdaterHandler.flushProjectToMongo projectId, (err) ->
 			if err?
 				return callback(err)
-			projectLabels = LabelsHandler.extractLabelsFromProjectDocs docs
+			ProjectEntityHandler.getAllDocs projectId, (err, docs) ->
-			callback(null, projectLabels)
+				if err?
+					return callback(err)
+				projectLabels = LabelsHandler.extractLabelsFromProjectDocs docs
+				callback(null, projectLabels)
 
 	getLabelsForDoc: (projectId, docId, callback=(err, docLabels)->) ->
-		# Flush doc first, because this action is often performed while
-		# a document is being edited by the client. By contrast,
-		# `getAllLabelsForProject` is called only when a project/editor is loaded
 		DocumentUpdaterHandler.flushDocToMongo projectId, docId, (err) ->
 			if err?
 				return callback(err)

services/web/test/UnitTests/coffee/Labels/LabelsHandlerTests.coffee

@@ -105,6 +105,7 @@ describe 'LabelsHandler', ->
 				'doc_one': {lines: ['\\label{aaa}']}
 			}
 			@fakeLabels = ['aaa']
+			@DocumentUpdaterHandler.flushProjectToMongo = sinon.stub().callsArgWith(1, null)
 			@ProjectEntityHandler.getAllDocs = sinon.stub().callsArgWith(1, null, @fakeDocs)
 			@LabelsHandler.extractLabelsFromProjectDocs = sinon.stub().returns(@fakeLabels)
 			@call = (callback) =>