Apply suggestions from code review

Co-authored-by: Garcia Samuel <sam.garcia.die@gmail.com>

Author: alejoe91

src/spikeinterface/widgets/sorting_summary.py

@@ -109,7 +109,7 @@ def __init__(
         if displayed_unit_properties is None:
             displayed_unit_properties = list(_default_displayed_unit_properties)
         if extra_unit_properties is not None:
-            displayed_unit_properties += list(extra_unit_properties.keys())
+            displayed_unit_properties = displayed_unit_properties + list(extra_unit_properties.keys())
 
         data_plot = dict(
             sorting_analyzer=sorting_analyzer,

src/spikeinterface/widgets/utils.py

@@ -284,10 +284,6 @@ def make_units_table_from_sorting(sorting, units_table=None):
         values = sorting.get_property(col)
         if values.dtype.kind in "iuUSfb" and values.ndim == 1:
             units_table.loc[:, col] = values
-        else:
-            warn(
-                f"Property {col} not added to the units table because it has ndim > 1 or dtype not supported",
-            )
 
     return units_table