remove GroupName attribute from Url plugin's open url behaviour

fixes the new tab/window selection binding not working with the new ui

Author: jjw24

Plugins/Flow.Launcher.Plugin.Url/SettingsControl.xaml

@@ -11,9 +11,9 @@
         </Grid.RowDefinitions>
         <StackPanel Orientation="Horizontal" Grid.Row="0">
             <Label Content="{DynamicResource flowlauncher_plugin_url_open_search_in}" Margin="0 10 15 0" />
-            <RadioButton x:Name="NewWindowBrowser" GroupName="OpenSearchBehaviour" 
+            <RadioButton x:Name="NewWindowBrowser"
                          Content="{DynamicResource flowlauncher_plugin_new_window}" Click="OnNewBrowserWindowClick" />
-            <RadioButton x:Name="NewTabInBrowser" GroupName="OpenSearchBehaviour" 
+            <RadioButton x:Name="NewTabInBrowser"
                          Content="{DynamicResource flowlauncher_plugin_new_tab}" Click="OnNewTabClick" />
         </StackPanel>
         <StackPanel VerticalAlignment="Top" Grid.Row="1" Height="106" Margin="0 20 0 0">