BIM: Fix widget value setting in ArchMaterial (#24710)

ArchMaterial's view provider has a setTaskValue helper to set values of widgets inside a task panel. While specific to ArchMaterial, the real place where the helper is called is at BIM_Classification. It appears it's not a general but more like an ad-hoc API for a specific purpose and for a specific object.

In any case, this fix allows widgets that expect a numerical value to have their value set. Before, their value was set as text, unexpectedly.

src/Mod/BIM/ArchMaterial.py

@@ -471,7 +471,7 @@ class _ViewProviderArchMaterial:
                     if hasattr(widget, "setText"):
                         widget.setText(value)
                     elif hasattr(widget, "setValue"):
-                        widget.setText(value)
+                        widget.setValue(value)
 
     def dumps(self):
         return None