stk-blender: property soft-minimum not set

[anon]

At `stk-blender/stk-utils.py:272`

Code:

- rna_ui_dict["soft_min"] = rops[p].min
+ rna_ui_dict["soft_min"] = props[p].min

Catch-all trys are scattered throughout the extension. This bug is hidden by one. These trys should be more targeted in what they catch.