fix goto buttons missing icon

Author: United600

src/Notepads/Controls/GoTo/GoToControl.xaml

@@ -53,12 +53,12 @@
                 Height="32"
                 Padding="0"
                 VerticalAlignment="Top"
-                Content=""
-                FontSize="16"
                 Visibility="Collapsed"
                 d:Visibility="Visible"
                 Click="SearchButton_OnClick"
-                IsTabStop="False" />
+                IsTabStop="False">
+            <FontIcon FontSize="16" Glyph="&#xEBE7;" />
+        </Button>
 
         <Button x:Name="DismissButton"
                 x:Uid="FindAndReplace_DismissButton"
@@ -68,9 +68,9 @@
                 Height="32"
                 Padding="0"
                 VerticalAlignment="Top"
-                Content="&#xE894;"
-                FontSize="16"
                 Click="DismissButton_OnClick"
-                IsTabStop="False" />
+                IsTabStop="False">
+            <FontIcon FontSize="16" Glyph="&#xE894;" />
+        </Button>
     </Grid>
 </UserControl>