Flint: A ROI created from Flint can be invalid in BLISS

During an edit_roi_counter the user selection can be aborted by a BLISS assertion.

The whole ROI selection is lost.

It would be good to filter the result, and at worst skip the problematic ROI.

The problem could be something else like a negative value. In this case it would be better to save it anyway / to normalize it.

Traceback (most recent call last):
  File "/users/valls/workspace/bliss.git/bliss/flint/helper/plot_interaction.py", line 602, in __selectionFinished
    shapes = self.__roisFromGui(selection)
  File "/users/valls/workspace/bliss.git/bliss/flint/helper/plot_interaction.py", line 539, in __roisFromGui
    shape = lima_roi.Roi(x, y, w, h, name=name)
  File "/users/valls/workspace/bliss.git/bliss/controllers/lima/roi.py", line 219, in __init__
    super().__init__(name)
  File "/users/valls/workspace/bliss.git/bliss/controllers/lima/roi.py", line 190, in __init__
    assert self.is_valid()
AssertionError