improve animation panel

src/app.cpp

@@ -562,7 +562,7 @@ bool App::update_ui_observer(Node *n)
             n->handle_on_screen(false, true);
             n->m_on_screen = true;
         }
-        glm::ivec4 c = glm::vec4(box.x - 1, (height / zoom - box.y - box.w - 1), box.z + 2, box.w + 2) * zoom;
+        glm::ivec4 c = glm::vec4(box.x /*- 1*/, (height / zoom - box.y - box.w /*- 1*/), box.z /*+ 2*/, box.w /*+ 2*/) * zoom;
         glScissor(floorf(c.x + off_x), floorf(c.y + off_y), ceilf(c.z), ceilf(c.w));
         n->draw();
         return true;