Merge #6822

6822: Fix editor crashes with quad point and other popup menus r=def- a=Robyt3

Closes #6817.

## Checklist

- [X] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test (especially base/) or added coverage to integration test
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: Robert Müller <robytemueller@gmail.com>

src/game/editor/editor.cpp

@@ -6577,12 +6577,9 @@ void CEditor::RenderMousePointer()
 
 void CEditor::Reset(bool CreateDefault)
 {
+	UI()->ClosePopupMenus();
 	m_Map.Clean();
 
-	//delete undo file
-	char aBuffer[1024];
-	m_pStorage->GetCompletePath(IStorage::TYPE_SAVE, "editor/", aBuffer, sizeof(aBuffer));
-
 	mem_zero(m_apSavedBrushes, sizeof m_apSavedBrushes);
 
 	// create default layers

src/game/editor/popups.cpp

@@ -1199,6 +1199,8 @@ CUI::EPopupMenuFunctionResult CEditor::PopupPoint(void *pContext, CUIRect View,
 {
 	CEditor *pEditor = static_cast<CEditor *>(pContext);
 	std::vector<CQuad *> vpQuads = pEditor->GetSelectedQuads();
+	if(!in_range<int>(pEditor->m_SelectedQuadIndex, 0, vpQuads.size() - 1))
+		return CUI::POPUP_CLOSE_CURRENT;
 	CQuad *pCurrentQuad = vpQuads[pEditor->m_SelectedQuadIndex];
 
 	enum