Various tweaks and fixes (#1683)

* Use operator's poll method to ensure correct execution

* Add utilities to get active collection item

* Minor fixes
zombie code
list comprehensions
typos
cleanup
tooltips, descriptions
ensure file extension in folder operator
use custom UI List instead of generic one
ensure active object stays the same after operator execution
use passed context instead of bpy

* Jump through hoops to not display empty dynamic enums

* Group mesh calculation methods in helper module
If not using bmesh, the polygon selection status
is updated only when getting out of Edit mode.
Using bmesh we can get the values in realtime

* Remove unused arg name in dosctring

src/ifcpatch/ifcpatch/__init__.py

@@ -63,8 +63,7 @@ def extract_docs(
     method_name: str="__init__",
     boilerplate_args : typing.Iterable[str]=None):
     """Extract class docstrings and method arguments
-    
-    :param module: Parent module from which to extract the submodule class
+
     :param submodule_name: Submodule from which to extract the class
     :param cls_name: Class from which to extract the docstring and method arguments
     :param method_name: Class Method name from which to extract arguments