Crash after pressing Remap tiles button

[sentry-io]

Sentry Issue: ASEPRITE-1CR

Thread 12468 Crashed:
0   aseprite.exe                    0x7ff7d70b7d16      [inlined] std::_Vb_reference<T>::operator= (vector:2431)
1   aseprite.exe                    0x7ff7d70b7d16      app::ColorBar::onRemapTilesButtonClick (color_bar.cpp:970)
2   aseprite.exe                    0x7ff7d7065d2b      [inlined] std::_Func_class<T>::operator() (functional:883)
3   aseprite.exe                    0x7ff7d7065d2b      [inlined] obs::slot<T>::operator() (slot.h:78)
4   aseprite.exe                    0x7ff7d7065d2b      obs::signal<T>::operator()<T> (signal.h:123)
5   aseprite.exe                    0x7ff7d75a7664      ui::ButtonBase::onProcessMessage (button.cpp:255)
6   aseprite.exe                    0x7ff7d75a1208      ui::Manager::sendMessageToWidget (manager.cpp:2023)
7   aseprite.exe                    0x7ff7d75a0985      ui::Manager::pumpQueue (manager.cpp:1897)
8   aseprite.exe                    0x7ff7d759d79d      ui::Manager::dispatchMessages (manager.cpp:864)
9   aseprite.exe                    0x7ff7d75a10a9      ui::Manager::run (manager.cpp:292)
10  aseprite.exe                    0x7ff7d706cb3a      app::App::run (app.cpp:546)
11  aseprite.exe                    0x7ff7d7064b5d      app_main (main.cpp:152)
12  aseprite.exe                    0x7ff7d782c845      wWinMain (main.cpp:40)
13  aseprite.exe                    0x7ff7d77a0de1      [inlined] invoke_main (exe_common.inl:118)
14  aseprite.exe                    0x7ff7d77a0de1      __scrt_common_main_seh (exe_common.inl:288)
15  KERNEL32.DLL                    0x7ffa47be7343      BaseThreadInitThunk
16  ntdll.dll                       0x7ffa492226b0      RtlUserThreadStart