Run Cellpose issue with imports

[MikeLippincott]

After clicking the "Test GPU" button in the RunCellpose module, this error shows up in my stdout:

Traceback (most recent call last):
  File "/path/to/conda/env/lib/python3.8/site-packages/cellprofiler/gui/module_view/_module_view.py", line 1206, in callback
    self.__on_do_something(event, setting)
  File "/path/to/conda/env/lib/python3.8/site-packages/cellprofiler/gui/module_view/_module_view.py", line 2247, in __on_do_something
    setting.on_event_fired()
  File "/path/to/conda/env/lib/python3.8/site-packages/cellprofiler_core/setting/do_something/_do_something.py", line 27, in on_event_fired
    self.__callback(*self.__args)
  File "/path/to/CP.plugins/CellProfiler-plugins/active_plugins/runcellpose.py", line 724, in do_check_gpu
    if self.save_probabilities.value:
NameError: name 'core' is not defined`

I can open a PR to patch this with the proposed change below:

Starting on current line 799 of runcellpose.py - add the import core statement

def do_check_gpu(self):
        import importlib.util

        from cellpose import core

        torch_installed = importlib.util.find_spec("torch") is not None
        self.cellpose_ver = importlib.metadata.version("cellpose")
        # if the old version of cellpose <2.0, then use istorch kwarg
        if float(self.cellpose_ver[0:3]) >= 0.7 and int(self.cellpose_ver[0]) < 2:
            GPU_works = core.use_gpu(istorch=torch_installed)
        else:  # if new version of cellpose, use use_torch kwarg
            GPU_works = core.use_gpu(use_torch=torch_installed)
        if GPU_works:
            message = "GPU appears to be working correctly!"
        else:
            message = (
                "GPU test failed. There may be something wrong with your configuration."
            )
        import wx

        wx.MessageBox(message, caption="GPU Test")