tag editor: add support for numerating tracks using xx/xx format

doc/config

@@ -290,6 +290,8 @@
 #
 #empty_tag_marker = "<empty>"
 #
+#tag_editor_extended_numeration = "no"
+#
 #enable_window_title = "yes"
 #
 ##

doc/ncmpcpp.1

@@ -246,6 +246,9 @@ If enabled, ncmpcpp will be able to delete files using its browser screen.
 .B allow_physical_directories_deletion = yes/no
 If enabled, ncmpcpp will be able to delete directories using its browser screen.
 .TP 
+.B tag_editor_extended_numeration  = yes/no
+If enabled, tag editor will number tracks using format xx/yy (where xx is the current track and yy is total amount of all numbered tracks), not plain xx.
+.TP
 .B enable_window_title = yes/no
 If enabled, ncmpcpp will override current window title with its own one.
 .TP

src/settings.cpp

@@ -320,6 +320,7 @@ void DefaultConfiguration(ncmpcpp_config &conf)
 	conf.new_design = false;
 	conf.visualizer_use_wave = true;
 	conf.browser_sort_by_mtime = false;
+	conf.tag_editor_extended_numeration = false;
 	conf.set_window_title = true;
 	conf.mpd_port = 6600;
 	conf.mpd_connection_timeout = 15;
@@ -853,6 +854,10 @@ void ReadConfiguration(ncmpcpp_config &conf)
 			{
 				conf.new_design = v == "alternative";
 			}
+			else if (cl.find("tag_editor_extended_numeration") != std::string::npos)
+			{
+				conf.tag_editor_extended_numeration = v == "yes";
+			}
 			else if (cl.find("enable_window_title") != std::string::npos)
 			{
 				conf.set_window_title = v == "yes";

src/settings.h

@@ -213,6 +213,7 @@ struct ncmpcpp_config
 	bool new_design;
 	bool visualizer_use_wave;
 	bool browser_sort_by_mtime;
+	bool tag_editor_extended_numeration;
 	
 	int mpd_port;
 	int mpd_connection_timeout;

src/tag_editor.cpp

@@ -547,7 +547,12 @@ void TagEditor::EnterPressed()
 				{
 					MPD::SongList::iterator it = EditedSongs.begin();
 					for (unsigned i = 1; i <= EditedSongs.size(); ++i, ++it)
-						(*it)->SetTrack(i);
+					{
+						if (Config.tag_editor_extended_numeration)
+							(*it)->SetTrack(IntoStr(i) + "/" + IntoStr(EditedSongs.size()));
+						else
+							(*it)->SetTrack(i);
+					}
 					ShowMessage("Tracks numbered!");
 				}
 				else