wxwindows/wizard.cpp: run Layout() on the sizers when changing output method

in the streaming method page of the wizard, in order to properly show all
text. Hardcode the top spacing in order to prevent controls from moving
around on Layout(). reported by markfm

modules/gui/wxwindows/wizard.cpp

@@ -999,7 +999,7 @@ wizStreamingMethodPage::wizStreamingMethodPage( wxWizard *parent,
     /* Create the texts */
     pageHeader( this, mainSizer,  STREAMING1_TITLE, STREAMING1_TEXT );
 
-    mainSizer->Add( 0,0,1 );
+    mainSizer->Add( 0,50,0 );
 
     i_method = 0;
 
@@ -1102,6 +1102,8 @@ void wizStreamingMethodPage::OnMethodChange(wxEvent& event)
     i_method = event.GetId() - MethodRadio0_Event;
     address_text->SetLabel( wxU(
      vlc_wraptext( _(methods_array[i_method].psz_address), TEXTWIDTH, false)));
+    address_sizer->Layout();
+    mainSizer->Layout();
 }
 
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