Fix viewport hovering when hover mode is set to right-click

src/main_gui.cpp

@@ -471,7 +471,7 @@ struct MainWindow : Window
 
 	virtual void OnMouseOver(Point pt, int widget)
 	{
-		if (pt.x != -1 && _game_mode != GM_MENU && _mouse_hovering) {
+		if (pt.x != -1 && _game_mode != GM_MENU && (_mouse_hovering || _settings_client.gui.hover_delay_ms == 0)) {
 			/* Show tooltip with last month production or town name */
 			const Point p = GetTileBelowCursor();
 			const TileIndex tile = TileVirtXY(p.x, p.y);

src/misc_gui.cpp

@@ -776,7 +776,9 @@ struct TooltipsWindow : public Window
 			case TCC_HOVER: if (!_mouse_hovering) delete this; break;
 
 			case TCC_HOVER_VIEWPORT:
-				if (!_mouse_hovering) {
+				if (_settings_client.gui.hover_delay_ms == 0) {
+					this->delete_next_mouse_loop = true;
+				} else if (!_mouse_hovering) {
 					delete this;
 					break;
 				}

src/viewport_gui.cpp

@@ -155,7 +155,7 @@ public:
 
 	virtual void OnMouseOver(Point pt, int widget)
 	{
-		if (pt.x != -1 && _mouse_hovering) {
+		if (pt.x != -1 && (_mouse_hovering || _settings_client.gui.hover_delay_ms == 0)) {
 			/* Show tooltip with last month production or town name */
 			const Point p = GetTileBelowCursor();
 			const TileIndex tile = TileVirtXY(p.x, p.y);

src/window.cpp

@@ -3040,6 +3040,8 @@ void HandleMouseEvents()
 				_mouse_hovering = true;
 			}
 		}
+	} else {
+		_mouse_hovering = false;
 	}
 
 	/* Handle sprite picker before any GUI interaction */