Mark widescreen resolutions in selection dialog.

Implements bug #15623 with patch #1568.

changelog

@@ -17,6 +17,8 @@ Version 1.9.0-svn:
    * Added "animated" logo to the --new-widgets title screen
    * Fixed the language is refreshed after the language is changed in the
      --new-widgets title screen
+   * Implemented bug #15623 (patch #1568): On change resolution screen,
+     widescreen resolutions are now marked as such
  * WML Engine:
    * Deprecated [set_variable]'s random key, use rand instead
    * Renamed [unit][status] healable to unhealable so it can default to 'no'

data/core/about.cfg

@@ -841,6 +841,9 @@
     [entry]
         name = "Daniel Bruegmann"
     [/entry]
+    [entry]
+	name= "Denny Vaccaro (endercoaster)"
+    [/entry]
     [entry]
         name = "Doug Rosvick (dlr365)"
         wikiuser = "dlr365"

src/preferences_display.cpp

@@ -531,6 +531,10 @@ bool show_video_mode_dialog(display& disp)
 			option << DEFAULT_ITEM;
 
 		option << j->first << "x" << j->second;
+		/*widescreen threshold is 5:3 to mark aspect ratios just
+		  a hair under 16:9 as widescreen*/
+		if ((double)j->first/j->second>=5.0/3)
+		  option << _(" (widescreen)");
 		options.push_back(option.str());
 	}