fix triggers not serializing correctly

src/anm2.cpp

@@ -16,7 +16,8 @@ void anm2_frame_serialize(Anm2Frame* frame, Anm2Type type, XMLDocument* document
 	XMLDocument localDocument;
 	XMLDocument* useDocument = document ? document : &localDocument;
 
-	XMLElement* element = useDocument->NewElement(ANM2_ELEMENT_STRINGS[ANM2_ELEMENT_FRAME]);
+	XMLElement* element = type == ANM2_TRIGGERS ? useDocument->NewElement(ANM2_ELEMENT_STRINGS[ANM2_ELEMENT_TRIGGERS]) : 
+												  useDocument->NewElement(ANM2_ELEMENT_STRINGS[ANM2_ELEMENT_FRAME]);
 	
 	if (type == ANM2_TRIGGERS)
 	{

src/imgui.cpp

@@ -1093,10 +1093,13 @@ static void _imgui_timeline(Imgui* self)
 
 				if (ImGui::BeginDragDropTarget())
 				{
-					if (const ImGuiPayload* payload = ImGui::AcceptDragDropPayload(frameButton.drag_drop_get()))
+					Anm2Reference swapReference;
+					if (const ImGuiPayload* payload = ImGui::GetDragDropPayload())
+						swapReference = *(Anm2Reference*)payload->Data;
+					
+					if (swapReference != reference && reference.itemType == swapReference.itemType)
 					{
-						Anm2Reference swapReference = *(Anm2Reference*)payload->Data;
-						if (swapReference != reference)
+						if (ImGui::AcceptDragDropPayload(frameButton.drag_drop_get()))
 						{
 							imgui_snapshot(self, IMGUI_ACTION_FRAME_SWAP);
 

src/imgui.h

@@ -1319,6 +1319,8 @@ IMGUI_ITEM(IMGUI_LAYER_REMOVE,
     self.label = "Remove",
     self.tooltip = "Removes the selected layer.\nThis will remove all layer animations that use this layer from all animations.",
     self.snapshotAction = "Remove Layer",
+    self.chord = ImGuiKey_Delete,
+    self.focusWindow = IMGUI_LAYERS.label,
     self.rowCount = IMGUI_LAYERS_OPTIONS_ROW_COUNT
 );
 
@@ -1349,6 +1351,8 @@ IMGUI_ITEM(IMGUI_NULL_REMOVE,
     self.label = "Remove",
     self.tooltip = "Removes the selected null.\nThis will remove all null animations that use this null from all animations.",
     self.snapshotAction = "Remove Null",
+    self.chord = ImGuiKey_Delete,
+    self.focusWindow = IMGUI_NULLS.label,
     self.rowCount = IMGUI_NULLS_OPTIONS_ROW_COUNT
 );