M_OpenVirtualKeyboard: add optional dummymenu argument

- Virtual Keyboard can switch to a temporary menu while
  typing
  - It will switch back to the previous menu after it's
    closed
- This functionality can be used even if the menu isn't
  already open
  - It will close the menu and return to gameplay when the
    Virtual Keyboard is closed

src/k_menu.h

@@ -556,6 +556,7 @@ extern struct menutyping_s
 	boolean keyboardshift;
 
 	vkb_query_fn_t queryfn; // callback on open and close
+	menu_t *dummymenu;
 	char cache[MAXSTRINGLENGTH]; // cached string
 
 } menutyping;
@@ -684,7 +685,8 @@ void M_PlayMenuJam(void);
 
 boolean M_ConsiderSealedSwapAlert(void);
 
-void M_OpenVirtualKeyboard(boolean gamepad, vkb_query_fn_t queryfn);
+void M_OpenVirtualKeyboard(boolean gamepad, vkb_query_fn_t queryfn, menu_t *dummymenu);
+void M_AbortVirtualKeyboard(void);
 void M_MenuTypingInput(INT32 key);
 
 void M_QuitResponse(INT32 ch);

src/k_menufunc.c

@@ -839,7 +839,7 @@ void M_ClearMenus(boolean callexitmenufunc)
 		D_StartTitle();
 	}
 
-	menutyping.active = false;
+	M_AbortVirtualKeyboard();
 	menumessage.active = false;
 
 	menuactive = false;
@@ -1133,7 +1133,7 @@ static void M_HandleMenuInput(void)
 			if (M_MenuConfirmPressed(pid))
 			{
 				// If we entered this menu by pressing a menu Key, default to keyboard typing, otherwise use controller.
-				M_OpenVirtualKeyboard(thisMenuKey == -1, M_QueryCvarAction);
+				M_OpenVirtualKeyboard(thisMenuKey == -1, M_QueryCvarAction, NULL);
 				return;
 			}
 			else if (M_MenuExtraPressed(pid))

src/menus/transient/virtual-keyboard.c

@@ -183,6 +183,16 @@ static void M_CloseVirtualKeyboard(void)
 	menutyping.queryfn(menutyping.cache);
 }
 
+void M_AbortVirtualKeyboard(void)
+{
+	if (!menutyping.active)
+		return;
+
+	menutyping.active = false;
+	if (currentMenu == menutyping.dummymenu)
+		M_GoBack(0);
+}
+
 static boolean M_IsTypingKey(INT32 key)
 {
 	return key == KEY_BACKSPACE || key == KEY_ENTER
@@ -202,7 +212,7 @@ void M_MenuTypingInput(INT32 key)
 		// Closing
 		menutyping.menutypingfade--;
 		if (!menutyping.menutypingfade)
-			menutyping.active = false;
+			M_AbortVirtualKeyboard();
 
 		return;	// prevent inputs while closing the menu.
 	}
@@ -405,12 +415,26 @@ void M_MenuTypingInput(INT32 key)
 	}
 }
 
-void M_OpenVirtualKeyboard(boolean gamepad, vkb_query_fn_t queryfn)
+void M_OpenVirtualKeyboard(boolean gamepad, vkb_query_fn_t queryfn, menu_t *dummymenu)
 {
 	menutyping.keyboardtyping = !gamepad;
 	menutyping.active = true;
 	menutyping.menutypingclose = false;
 
 	menutyping.queryfn = queryfn;
+	menutyping.dummymenu = dummymenu;
 	strlcpy(menutyping.cache, queryfn(NULL), MAXSTRINGLENGTH);
+
+	if (dummymenu)
+	{
+		if (!menuactive)
+		{
+			M_StartControlPanel();
+			dummymenu->prevMenu = NULL;
+		}
+		else
+			dummymenu->prevMenu = currentMenu;
+
+		M_SetupNextMenu(dummymenu, true);
+	}
 }