Correctly update drag-and-drop cursor if our window gets deactivated

client/gui/CCursorHandler.cpp

@@ -67,6 +67,8 @@ void CCursorHandler::initCursor()
 
 void CCursorHandler::changeGraphic(ECursor::ECursorTypes type, int index)
 {
+	assert(dndObject == nullptr);
+
 	if(type != this->type)
 	{
 		this->type = type;

client/widgets/CArtifactHolder.cpp

@@ -254,6 +254,22 @@ void CHeroArtPlace::clickRight(tribool down, bool previousState)
 	}
 }
 
+void CArtifactsOfHero::activate()
+{
+	if (commonInfo->src.AOH == this && commonInfo->src.art)
+		CCS->curh->dragAndDropCursor(make_unique<CAnimImage>("artifact", commonInfo->src.art->artType->getIconIndex()));
+
+	CIntObject::activate();
+}
+
+void CArtifactsOfHero::deactivate()
+{
+	if (commonInfo->src.AOH == this && commonInfo->src.art)
+		CCS->curh->dragAndDropCursor(nullptr);
+
+	CIntObject::deactivate();
+}
+
 /**
  * Selects artifact slot so that the containing artifact looks like it's picked up.
  */

client/widgets/CArtifactHolder.h

@@ -148,6 +148,9 @@ public:
 	void dispose(); //free resources not needed after closing windows and reset state
 	void scrollBackpack(int dir); //dir==-1 => to left; dir==1 => to right
 
+	void activate() override;
+	void deactivate() override;
+
 	void safeRedraw();
 	void markPossibleSlots(const CArtifactInstance* art);
 	void unmarkSlots(bool withRedraw = true); //unmarks slots in all visible AOHs