MP Staging/Join Game: disable Esc existing (fixes #3601)

changelog.md

@@ -125,6 +125,7 @@
    * Game Load screen gracefully handles savefiles that can't be parsed. (issue #3652)
    * The sidebar now shows alignment and damages as they would be on the hex under
      the mouse, rather than at the unit's current location. (PR #3642)
+   * Fixed being able to dismiss a game lobby by pressing Esc.
 
 ## Version 1.14.5
  ### AI

src/gui/dialogs/multiplayer/mp_join_game.cpp

@@ -224,6 +224,7 @@ static std::string generate_user_description(const config& side)
 void mp_join_game::pre_show(window& window)
 {
 	window.set_enter_disabled(true);
+	window.set_escape_disabled(true);
 
 	//
 	// Set title
@@ -450,7 +451,7 @@ void mp_join_game::generate_side_list(window& window)
 				//
 				const auto handler = [this, side_num](bool& handled, bool& halt) {
 					show_flg_select(side_num);
-					// note: this function is called from a std::function object stored in the widget 
+					// note: this function is called from a std::function object stored in the widget
 					//       and show_flg_select which internally calls
 					//       show_dialog -> pump -> ... -> network_handler -> ... -> generate_side_list
 					//       might destroy that std::function object while it is executed, this means that

src/gui/dialogs/multiplayer/mp_staging.cpp

@@ -73,6 +73,7 @@ mp_staging::~mp_staging()
 void mp_staging::pre_show(window& window)
 {
 	window.set_enter_disabled(true);
+	window.set_escape_disabled(true);
 
 	//
 	// Set title and status widget states