Make the title of foreign file format warning translatable

Also, change the contained text slightly.
Thanks to William Gathoye for noticing and producing a first patch

sfx2/source/dialog/alienwarn.src

@@ -38,7 +38,7 @@ ModalDialog RID_DLG_ALIEN_WARNING
     Moveable = TRUE;
     SVLook = TRUE;
 
-    Text = "Save";
+    Text [ en-US ] = "Confirm File Format";
 
     FixedImage FI_QUERY
     {
@@ -51,8 +51,7 @@ ModalDialog RID_DLG_ALIEN_WARNING
         Size = MAP_APPFONT( DIALOG_WIDTH-AW_COL_2-RSC_SP_DLG_INNERBORDER_RIGHT, INFO_TEXT_LINES*RSC_CD_FIXEDTEXT_HEIGHT );
         NoLabel = TRUE;
         Wordbreak = TRUE;
-        Text [ en-US-old ] = "This document may contain formatting or content that cannot be saved in the %FORMATNAME file format. Do you want to save the document in this format anyway?\n\n- Click 'Yes' to save in %FORMATNAME file format.\n- Click 'No' to use the latest OpenDocument file format and be sure all formatting and content is saved correctly.";
-        Text [ en-US ] = "This document may contain formatting or content that cannot be saved in the currently selected file format \"%FORMATNAME\".\n\nUse the default ODF file format to be sure that the document is saved correctly.";
+        Text [ en-US ] = "This document may contain content that cannot be saved in the currently selected file format \"%FORMATNAME\". Do you really want to use \"%FORMATNAME\"?\n\nTo be sure the document is saved correctly, use the ODF format.";
     };
     OKButton PB_NO
     {