MP Lobby: removed Refresh button

I'm not 100% sure about this change, but I think its presence was rather confusing and
it (hopefully) shouldn't ever be needed.

(cherry-picked from commit fe10bc0315)

data/gui/window/lobby_main.cfg

@@ -437,31 +437,22 @@
 
 #define _GUI_CONTROL_AREA
 	[grid]
+		[row]
+			[column]
+				border = "all"
+				border_size = 5
+				horizontal_grow = true
+				[button]
+					id = "quit"
+					definition = "large"
+					label = _ "Log Out"
+				[/button]
+			[/column]
+		[/row]
 		[row]
 			[column]
 				horizontal_grow = true
 				[grid]
-					[row]
-						[column]
-							border = "all"
-							border_size = 5
-							[button]
-								id = "quit"
-								definition = "large"
-								label = _ "Log Out"
-							[/button]
-						[/column]
-
-						[column]
-							border = "all"
-							border_size = 5
-							[button]
-								id = "refresh"
-								definition = "large"
-								label = _ "Refresh"
-							[/button]
-						[/column]
-					[/row]
 
 					[row]
 
@@ -591,18 +582,6 @@
 								[/label]
 							[/column]
 
-							[column]
-								grow_factor = 0
-								border = "left,right,top"
-								horizontal_alignment = "right"
-								border_size = 5
-								[button]
-									id = "refresh"
-									definition = "default"
-									label = _ "Refresh"
-								[/button]
-							[/column]
-
 							[column]
 								grow_factor = 0
 								horizontal_alignment = "right"

src/gui/dialogs/multiplayer/lobby.cpp

@@ -747,10 +747,6 @@ void mp_lobby::pre_show(window& window)
 
 	find_widget<button>(&window, "create", false).set_retval(CREATE);
 
-	connect_signal_mouse_left_click(
-		find_widget<button>(&window, "refresh", false),
-		std::bind(&mp_lobby::refresh_lobby, this));
-
 	connect_signal_mouse_left_click(
 		find_widget<button>(&window, "show_preferences", false),
 		std::bind(&mp_lobby::show_preferences_button_callback, this, std::ref(window)));