auto trim hostname and port when joining host (#2286)

gframe/game.h

@@ -158,6 +158,12 @@ public:
 		return focus && focus->hasType(type);
 	}
 
+	void TrimText(irr::gui::IGUIElement* editbox) const {
+		irr::core::stringw text(editbox->getText());
+		text.trim();
+		editbox->setText(text.c_str());
+	}
+
 	void OnResize();
 	recti Resize(s32 x, s32 y, s32 x2, s32 y2);
 	recti Resize(s32 x, s32 y, s32 x2, s32 y2, s32 dx, s32 dy, s32 dx2, s32 dy2);

gframe/menu_handler.cpp

@@ -62,6 +62,8 @@ bool MenuHandler::OnEvent(const irr::SEvent& event) {
 			}
 			case BUTTON_JOIN_HOST: {
 				bot_mode = false;
+				mainGame->TrimText(mainGame->ebJoinHost);
+				mainGame->TrimText(mainGame->ebJoinPort);
 				char ip[20];
 				const wchar_t* pstr = mainGame->ebJoinHost->getText();
 				BufferIO::CopyWStr(pstr, ip, 16);