Cleaned up UI strings passed to the file dialog

Most of these were wordier than necessary (e.g. "Save the Map As"
instead of "Save Map As). Also replaced "want" with "wish" in external
prompts at vultraz's suggestion.

src/editor/map/context_manager.cpp

@@ -193,7 +193,7 @@ void context_manager::load_map_dialog(bool force_same_context /* = false */)
 
 	gui2::tfile_dialog dlg;
 
-	dlg.set_title(_("Choose a File to Open"))
+	dlg.set_title(_("Load Map"))
 	   .set_path(fn);
 
 	if(dlg.show(gui_.video())) {
@@ -452,7 +452,7 @@ void context_manager::apply_mask_dialog()
 
 	gui2::tfile_dialog dlg;
 
-	dlg.set_title(_("Choose a Mask to Apply"))
+	dlg.set_title(_("Apply Mask"))
 	   .set_path(fn);
 
 	if(dlg.show(gui_.video())) {
@@ -623,7 +623,7 @@ void context_manager::save_map_as_dialog()
 
 		gui2::tfile_dialog dlg;
 
-		dlg.set_title(_("Save the Map As"))
+		dlg.set_title(_("Save Map As"))
 		   .set_ok_label(_("Save"))
 		   .set_save_mode(true)
 		   .set_path(input_name)
@@ -634,7 +634,7 @@ void context_manager::save_map_as_dialog()
 
 			if (filesystem::file_exists(input_name)) {
 				int res = gui2::show_message(gui_.video(), "",
-						_("The file already exists. Do you want to overwrite it?"), gui2::tmessage::yes_no_buttons);
+						_("The file already exists. Do you wish to overwrite it?"), gui2::tmessage::yes_no_buttons);
 				overwrite_res = gui2::twindow::CANCEL == res ? 1 : 0;
 			} else {
 				overwrite_res = 0;
@@ -661,7 +661,7 @@ void context_manager::save_scenario_as_dialog()
 
 		gui2::tfile_dialog dlg;
 
-		dlg.set_title(_("Save the Scenario As"))
+		dlg.set_title(_("Save Scenario As"))
 		   .set_ok_label(_("Save"))
 		   .set_save_mode(true)
 		   .set_path(input_name)
@@ -672,7 +672,7 @@ void context_manager::save_scenario_as_dialog()
 
 			if (filesystem::file_exists(input_name)) {
 				int res = gui2::show_message(gui_.video(), "",
-						_("The file already exists. Do you want to overwrite it?"), gui2::tmessage::yes_no_buttons);
+						_("The file already exists. Do you wish to overwrite it?"), gui2::tmessage::yes_no_buttons);
 				overwrite_res = gui2::twindow::CANCEL == res ? 1 : 0;
 			} else {
 				overwrite_res = 0;

src/menu_events.cpp

@@ -168,7 +168,7 @@ void menu_handler::save_map()
 	do {
 		gui2::tfile_dialog dlg;
 
-		dlg.set_title(_("Save the Map As"))
+		dlg.set_title(_("Save Map As"))
 		   .set_save_mode(true)
 		   .set_path(input_name)
 		   .set_extension(".map");
@@ -177,7 +177,7 @@ void menu_handler::save_map()
 			input_name = dlg.path();
 
 			if (filesystem::file_exists(input_name)) {
-				const int res = gui2::show_message((*gui_).video(), "", _("The map already exists. Do you want to overwrite it?"), gui2::tmessage::yes_no_buttons);
+				const int res = gui2::show_message((*gui_).video(), "", _("The map already exists. Do you wish to overwrite it?"), gui2::tmessage::yes_no_buttons);
 				overwrite = res == gui2::twindow::CANCEL ? 1 : 0;
 			}
 			else