Convert the debug clock to a non modal dialog.

This is just a test case also enables a helptip for the hour progress
bar.

data/gui/default/window/debug_clock.cfg

@@ -68,6 +68,9 @@
 
 					[progress_bar]
 						id = "hour_percentage"
+
+						tooltip = "Hours in percent."
+						help = "The full range of the bar is 24 hours."
 					[/progress_bar]
 
 				[/column]

src/gui/dialogs/debug_clock.cpp

@@ -17,6 +17,7 @@
 
 #include "gui/dialogs/debug_clock.hpp"
 
+#include "gui/dialogs/dialog.hpp"
 #include "gui/widgets/integer_selector.hpp"
 #include "gui/widgets/window.hpp"
 #include "gui/widgets/settings.hpp"

src/gui/dialogs/debug_clock.hpp

@@ -16,7 +16,7 @@
 #ifndef GUI_DIALOGS_DEBUG_CLOCK_HPP_INCLUDED
 #define GUI_DIALOGS_DEBUG_CLOCK_HPP_INCLUDED
 
-#include "gui/dialogs/dialog.hpp"
+#include "gui/dialogs/popup.hpp"
 
 #include "gui/auxiliary/event/dispatcher.hpp"
 
@@ -28,11 +28,11 @@ class tinteger_selector_;
 
 /** Clock to test the draw events. */
 class tdebug_clock
-	: public tdialog
+	: public tpopup
 {
 public:
 	tdebug_clock()
-		: tdialog()
+		: tpopup()
 		, hour_percentage_(NULL)
 		, minute_percentage_(NULL)
 		, second_percentage_(NULL)

src/gui/dialogs/title_screen.cpp

@@ -392,7 +392,7 @@ void ttitle_screen::show_debug_clock_window(CVideo& video)
 		debug_clock_ = 0;
 	} else {
 		debug_clock_ = new tdebug_clock();
-		debug_clock_->show_tooltip(video);
+		debug_clock_->show(video, true);
 	}
 }
 

src/gui/dialogs/title_screen.hpp

@@ -20,6 +20,8 @@
 
 namespace gui2 {
 
+class tpopup;
+
 /** Do we wish to show the button for the debug clock. */
 extern bool show_debug_clock_button;
 
@@ -76,7 +78,7 @@ private:
 	unsigned long logo_timer_id_;
 
 	/** Holds the debug clock dialog. */
-	tdialog* debug_clock_;
+	tpopup* debug_clock_;
 
 	/**
 	 * Updates the tip of day widget.