add option media_library_disable_two_column_mode

doc/config

@@ -323,6 +323,8 @@
 #
 #media_library_display_date = "yes"
 #
+#media_library_disable_two_column_mode = "no"
+#
 #enable_window_title = "yes"
 #
 ##

doc/ncmpcpp.1

@@ -264,6 +264,9 @@ If enabled, tag editor will number tracks using format xx/yy (where xx is the cu
 .B media_library_display_date  = yes/no
 If enabled, dates of albums in media library will be displayed and respected in searching, otherwise not.
 .TP
+.B media_library_disable_two_column_mode  = yes/no
+If enabled, pressing the key for the media library twice won't switch it to two column mode.
+.TP
 .B enable_window_title = yes/no
 If enabled, ncmpcpp will override current window title with its own one.
 .TP

src/help.cpp

@@ -258,6 +258,7 @@ void Help::GetKeybindings()
 	
 	
 	*w << "\n\n   " << fmtBold << "Keys - Media library\n -----------------------------------------\n" << fmtBoldEnd;
+	if (!Config.media_library_disable_two_column_mode)
 		*w << DisplayKeys(Key.MediaLibrary)		<< "Switch between two/three columns\n";
 	*w << DisplayKeys(&Key.VolumeDown[0], 1)	<< "Previous column\n";
 	*w << DisplayKeys(&Key.VolumeUp[0], 1)		<< "Next column\n";

src/media_library.cpp

@@ -125,7 +125,7 @@ void MediaLibrary::Refresh()
 
 void MediaLibrary::SwitchTo()
 {
-	if (myScreen == this)
+	if (myScreen == this && !Config.media_library_disable_two_column_mode)
 	{
 		hasTwoColumns = !hasTwoColumns;
 		hasToBeResized = 1;

src/settings.cpp

@@ -373,6 +373,7 @@ void DefaultConfiguration(ncmpcpp_config &conf)
 	conf.browser_sort_by_mtime = false;
 	conf.tag_editor_extended_numeration = false;
 	conf.media_library_display_date = true;
+	conf.media_library_disable_two_column_mode = false;
 	conf.discard_colors_if_item_is_selected = true;
 	conf.set_window_title = true;
 	conf.mpd_port = 6600;
@@ -953,6 +954,10 @@ void ReadConfiguration(ncmpcpp_config &conf)
 			{
 				conf.media_library_display_date = v == "yes";
 			}
+			else if (cl.find("media_library_disable_two_column_mode") != std::string::npos)
+			{
+				conf.media_library_disable_two_column_mode = v == "yes";
+			}
 			else if (cl.find("discard_colors_if_item_is_selected") != std::string::npos)
 			{
 				conf.discard_colors_if_item_is_selected = v == "yes";

src/settings.h

@@ -220,6 +220,7 @@ struct ncmpcpp_config
 	bool browser_sort_by_mtime;
 	bool tag_editor_extended_numeration;
 	bool media_library_display_date;
+	bool media_library_disable_two_column_mode;
 	bool discard_colors_if_item_is_selected;
 	
 	int mpd_port;