Make track changes default with override for old history

services/web/app/coffee/controllers/ProjectController.coffee

@@ -154,7 +154,7 @@ module.exports = class ProjectController
 										spellCheckLanguage: user.ace.spellCheckLanguage
 										pdfViewer : user.ace.pdfViewer
 										docPositions: {}
-										trackChanges: user.featureSwitches.trackChanges
+										oldHistory: !!user.featureSwitches?.oldHistory
 									})
 									sharelatexObject : JSON.stringify({
 										siteUrl: Settings.siteUrl,

services/web/app/coffee/models/User.coffee

@@ -32,7 +32,7 @@ UserSchema = new Schema
 						}
 	featureSwitches	  : {
 							dropbox: {type:Boolean, default:true},
-							trackChanges: {type:Boolean, default:false}
+							oldHistory: {type:Boolean}
 						}
 	referal_id : {type:String, default:() -> uuid.v4().split("-")[0]}
 	refered_users: [ type:ObjectId, ref:'User' ]

services/web/public/coffee/ide.coffee

@@ -119,10 +119,10 @@ define [
 			@cursorManager = new CursorManager(@)
 			@fileViewManager = new FileViewManager(@)
 			@analyticsManager = new AnalyticsManager(@)
-			if @userSettings.trackChanges
-				@trackChangesManager = new TrackChangesManager(@)
-			else
+			if @userSettings.oldHistory
 				@historyManager = new HistoryManager(@)
+			else
+				@trackChangesManager = new TrackChangesManager(@)
 
 			@setLoadingMessage("Connecting")
 			firstConnect = true