Clarify instancing wording notice

Author: IvenBach

Rubberduck.Core/UI/Refactorings/ExtractInterface/ExtractInterfaceView.xaml

@@ -58,10 +58,11 @@
                 <Grid>
                     <ComboBox ItemsSource="{Binding ClassInstances}"
                               SelectedValue="{Binding InterfaceInstancing, Mode=TwoWay}"
-                              Visibility="{Binding IsClassInstancingMutable, Converter={StaticResource BoolToVisibility}}">
+                              Visibility="{Binding CanChooseInterfaceInstancing, Converter={StaticResource BoolToVisibility}}">
                     </ComboBox>
-                    <Label Visibility="{Binding IsClassInstancingMutable, Converter={StaticResource BoolToHiddenVisibility}}"
-                           Content="{Resx ResxName=Rubberduck.Resources.RubberduckUI, Key=ExtractInterface_PublicInstancingMandatedByPublicClass}" />
+                    <TextBlock Visibility="{Binding CanChooseInterfaceInstancing, Converter={StaticResource BoolToHiddenVisibility}}"
+                               Text="{Resx ResxName=Rubberduck.Resources.RubberduckUI, Key=ExtractInterface_PublicInstancingMandatedByPublicClass}"
+                               TextWrapping="Wrap" />
                 </Grid>
             </GroupBox>
 

Rubberduck.Core/UI/Refactorings/ExtractInterface/ExtractInterfaceViewModel.cs

@@ -61,13 +61,7 @@ public bool IsValidInterfaceName
             }
         }
 
-        public bool IsClassInstancingMutable
-        {
-            get
-            {
-                return Model.ImplementingClassInstancing != ClassInstancing.Public;
-            }
-        }
+        public bool CanChooseInterfaceInstancing => Model.ImplementingClassInstancing != ClassInstancing.Public;
 
         public IEnumerable<ClassInstancing> ClassInstances => Enum.GetValues(typeof(ClassInstancing)).Cast<ClassInstancing>();
 

Rubberduck.Resources/RubberduckUI.Designer.cs

@@ -1829,6 +1829,8 @@ Import aborted.</value>
     <value>Public</value>
   </data>
   <data name="ExtractInterface_PublicInstancingMandatedByPublicClass" xml:space="preserve">
-    <value>'Public' will be chosen. For private instancing make implementing class private also.</value>
+    <value>The implementing class is 'Public' mandating the interface be public as well.
+If you require a 'Private' interface, change the classes instancing to private as well.
+A private class can still implement a public interface.</value>
   </data>
 </root>