Fix deprecations regarding Watermark

src/Views/EditFile.axaml

@@ -20,12 +20,12 @@
                     FontSize="16"
                     FontWeight="Bold" />
             <Label Content="Title" />
-            <TextBox Watermark="Title"
+            <TextBox PlaceholderText="Title"
                         Text="{Binding ClonedFile.Title}"
                         VerticalAlignment="Stretch"
                         TextWrapping="Wrap" />
             <Label Content="Notes" />
-            <TextBox Watermark="Notes"
+            <TextBox PlaceholderText="Notes"
                         Text="{Binding ClonedFile.Notes}"
                         VerticalAlignment="Stretch"
                         AcceptsReturn="True"

src/Views/MainView.axaml

@@ -50,7 +50,7 @@
                IsVisible="{Binding IsTitleBoxVisible}" />
         <TextBox Text="{Binding ReportTitle}"
                  IsVisible="{Binding IsTitleBoxVisible}"
-                 Watermark="Receipts December 2024"
+                 PlaceholderText="Receipts December 2024"
                  Margin="2,0,2,4"
                  Classes="clearButton"
                  Name="TitleTextBox">
@@ -121,7 +121,7 @@
                 <DataGridTemplateColumn.CellEditingTemplate>
                     <DataTemplate DataType="models:ReportFile">
                         <TextBox Text="{Binding Title}"
-                                 Watermark="Title"
+                                 PlaceholderText="Title"
                                  ToolTip.Tip="{Binding Title}"
                                  Classes="clearButton">
                             <TextBox.KeyBindings>