Desktop: rebuild the hosts board once the typing in the find box pauses, not once a letter

src/DodoSSH.Client.App/Views/HostsScreen.axaml

@@ -230,9 +230,13 @@
 
         Ctrl+K is named on it because the palette is the other way to reach a host by typing, and somebody
         who has found this box should know about the one that also connects on Enter.
+
+        One way, and passed back by the code-behind once the typing pauses: every change to the filter
+        rebuilds the board's sections and their cards, and a name typed at speed used to do that once a
+        letter. The view model still filters the moment it is told. See HostsScreen.OnFilterTyped.
       -->
       <Border Grid.Row="1" Margin="26,0,26,16">
-        <TextBox x:Name="HostFilter" Text="{Binding HostFilter}" Height="40" CornerRadius="10"
+        <TextBox x:Name="HostFilter" Text="{Binding HostFilter, Mode=OneWay}" Height="40" CornerRadius="10"
                  FontFamily="{StaticResource MonoFont}"
                  PlaceholderText="Find a host by name, address or note…   ·   Ctrl+K searches and connects" />
       </Border>