minor modified input element verifying logic

src/Shared/HandyControl_Shared/Controls/Input/CheckComboBox/CheckComboBox.cs

@@ -198,6 +198,11 @@ namespace HandyControl.Controls
                 {
                     SetCurrentValue(ErrorStrProperty, Validation.GetErrors(this)[0].ErrorContent);
                 }
+                else
+                {
+                    SetCurrentValue(IsErrorProperty, ValueBoxes.FalseBox);
+                    SetCurrentValue(ErrorStrProperty, default(string));
+                }
             }
 
             return !isError;

src/Shared/HandyControl_Shared/Controls/Input/ComboBox.cs

@@ -370,6 +370,11 @@ namespace HandyControl.Controls
                 {
                     SetCurrentValue(ErrorStrProperty, Validation.GetErrors(this)[0].ErrorContent);
                 }
+                else
+                {
+                    SetCurrentValue(IsErrorProperty, ValueBoxes.FalseBox);
+                    SetCurrentValue(ErrorStrProperty, default(string));
+                }
             }
 
             return !isError;

src/Shared/HandyControl_Shared/Controls/Input/DatePicker.cs

@@ -166,6 +166,11 @@ namespace HandyControl.Controls
                 {
                     SetCurrentValue(ErrorStrProperty, Validation.GetErrors(this)[0].ErrorContent);
                 }
+                else
+                {
+                    SetCurrentValue(IsErrorProperty, ValueBoxes.FalseBox);
+                    SetCurrentValue(ErrorStrProperty, default(string));
+                }
             }
             return !isError;
         }

src/Shared/HandyControl_Shared/Controls/Input/DateTimePicker.cs

@@ -440,6 +440,11 @@ namespace HandyControl.Controls
                 {
                     SetCurrentValue(ErrorStrProperty, Validation.GetErrors(this)[0].ErrorContent);
                 }
+                else
+                {
+                    SetCurrentValue(IsErrorProperty, ValueBoxes.FalseBox);
+                    SetCurrentValue(ErrorStrProperty, default(string));
+                }
             }
             return !isError;
         }

src/Shared/HandyControl_Shared/Controls/Input/PasswordBox.cs

@@ -271,6 +271,11 @@ namespace HandyControl.Controls
                 {
                     SetCurrentValue(ErrorStrProperty, Validation.GetErrors(this)[0].ErrorContent);
                 }
+                else
+                {
+                    SetCurrentValue(IsErrorProperty, ValueBoxes.FalseBox);
+                    SetCurrentValue(ErrorStrProperty, default(string));
+                }
             }
             return !isError;
         }

src/Shared/HandyControl_Shared/Controls/Input/TextBox.cs

@@ -125,6 +125,11 @@ namespace HandyControl.Controls
                 {
                     SetCurrentValue(ErrorStrProperty, Validation.GetErrors(this)[0].ErrorContent);
                 }
+                else
+                {
+                    SetCurrentValue(IsErrorProperty, ValueBoxes.FalseBox);
+                    SetCurrentValue(ErrorStrProperty, default(string));
+                }
             }
 
             return !isError;

src/Shared/HandyControl_Shared/Controls/Input/TimePicker.cs

@@ -408,6 +408,11 @@ namespace HandyControl.Controls
                 {
                     SetCurrentValue(ErrorStrProperty, Validation.GetErrors(this)[0].ErrorContent);
                 }
+                else
+                {
+                    SetCurrentValue(IsErrorProperty, ValueBoxes.FalseBox);
+                    SetCurrentValue(ErrorStrProperty, default(string));
+                }
             }
             return !isError;
         }