improvements

iOSClient/FileSystem/NCDatabase.swift

@@ -12,7 +12,7 @@ import RealmSwift
 class DBActivity: Object {
     
     dynamic var account = ""
-    dynamic var action = ""
+    dynamic var action = "Activity"
     dynamic var date = Date()
     dynamic var file = ""
     dynamic var fileID = ""

iOSClient/FileSystem/NCManageDatabase.swift

@@ -43,7 +43,6 @@ class NCManageDatabase: NSObject {
                 let dbActivity = DBActivity()
                 
                 dbActivity.account = account
-                dbActivity.action = "Activity"
                 dbActivity.date = activity.date
                 dbActivity.idActivity = Double(activity.idActivity)
                 dbActivity.link = activity.link