Added more tests

Code cleanup in Lib
WIP new VM for OpendatabaseControl
WIP KDBX4 file save - still not working

ModernKeePass/ViewModels/Controls/OpenDatabaseUserControlVM.cs

@@ -0,0 +1,11 @@
+using ModernKeePass.Common;
+using ModernKeePassLib.Cryptography;
+
+namespace ModernKeePass.ViewModels
+{
+    public class OpenDatabaseUserControlVm: NotifyPropertyChangedBase
+    {
+
+        //public double PasswordComplexityIndicator => QualityEstimation.EstimatePasswordBits(Password.ToCharArray());
+    }
+}