Add shortcut for the Multiplayer window (#3509)

data/language/en-GB.txt

@@ -4117,6 +4117,7 @@ STR_5808    :{WINDOW_COLOUR_2}Number of shops and stalls: {BLACK}{COMMA16}
 STR_5809    :{WINDOW_COLOUR_2}Number of information kiosks and other facilities: {BLACK}{COMMA16}
 STR_5810    :Disable train length limit
 STR_5811    :{SMALLFONT}{BLACK}If checked, you can have up to{NEWLINE}255 cars per train
+STR_5812    :Show multiplayer window
 
 #############
 # Scenarios #

src/config.h

@@ -77,6 +77,7 @@ enum {
 	SHORTCUT_SHOW_OPTIONS,
 	SHORTCUT_MUTE_SOUND,
 	SHORTCUT_WINDOWED_MODE_TOGGLE,
+	SHORTCUT_SHOW_MULTIPLAYER,
 
 	SHORTCUT_COUNT
 };

src/interface/keyboard_shortcut.c

@@ -537,6 +537,12 @@ static void shortcut_windowed_mode_toggle()
 	platform_toggle_windowed_mode();
 }
 
+static void shortcut_show_multiplayer()
+{
+	if (network_get_mode() != NETWORK_MODE_NONE)
+		window_multiplayer_open();
+}
+
 static const shortcut_action shortcut_table[SHORTCUT_COUNT] = {
 	shortcut_close_top_most_window,
 	shortcut_close_all_floating_windows,
@@ -585,7 +591,8 @@ static const shortcut_action shortcut_table[SHORTCUT_COUNT] = {
 	shortcut_quick_save_game,
 	shortcut_show_options,
 	shortcut_mute_sound,
-	shortcut_windowed_mode_toggle
+	shortcut_windowed_mode_toggle,
+	shortcut_show_multiplayer,
 };
 
 #pragma endregion

src/localisation/string_ids.h

@@ -2448,6 +2448,8 @@ enum {
 
 	STR_CHEAT_DISABLE_TRAIN_LENGTH_LIMIT = 5810,
 	STR_CHEAT_DISABLE_TRAIN_LENGTH_LIMIT_TIP = 5811,
+	
+	STR_SHORTCUT_SHOW_MULTIPLAYER = 5812,
 
 	// Have to include resource strings (from scenarios and objects) for the time being now that language is partially working
 	STR_COUNT = 32768

src/windows/shortcut_keys.c

@@ -130,7 +130,8 @@ const rct_string_id ShortcutStringIds[] = {
 	STR_SHORTCUT_QUICK_SAVE_GAME,
 	STR_SHORTCUT_SHOW_OPTIONS,
 	STR_SHORTCUT_MUTE_SOUND,
-	STR_SHORTCUT_WINDOWED_MODE_TOGGLE
+	STR_SHORTCUT_WINDOWED_MODE_TOGGLE,
+	STR_SHORTCUT_SHOW_MULTIPLAYER,
 };
 
 /**