Make adding openings more discoverable

1) It's back as Shift-O hotkey in BIM tool - https://i.imgur.com/XfmfqNY.png
2) It's always visible in Voids UI - https://i.imgur.com/rO6nOSw.png

src/bonsai/bonsai/bim/module/model/workspace.py

@@ -960,6 +960,13 @@ class EditObjectUI:
             op_text = "Add Void" if ui_context != "TOOL_HEADER" else ""
             op_icon = custom_icon_previews["ADD_VOID"].icon_id
             row = cls.layout.row(align=True) if ui_context != "TOOL_HEADER" else row
+            op = row.operator("bim.add_element", text=op_text, icon_value=op_icon)
+            op.ifc_product = "IfcFeatureElement"
+            op.ifc_class = "IfcOpeningElement"
+            op.skip_dialog = True
+            if ui_context != "TOOL_HEADER":
+                row.label(text="", icon="EVENT_SHIFT")
+                row.label(text="", icon="EVENT_O")
 
         if AuthoringData.data["is_voidable_element"]:
             if AuthoringData.data["has_visible_openings"]:
@@ -1342,8 +1349,12 @@ class Hotkey(bpy.types.Operator, tool.Ifc.Operator):
         bpy.ops.bim.add_boundary()
 
     def hotkey_S_O(self):
-        if len(bpy.context.selected_objects) == 2:
+        if len(bpy.context.selected_objects) > 1:
             bpy.ops.bim.add_opening()
+        else:
+            bpy.ops.bim.add_element(
+                "INVOKE_DEFAULT", ifc_product="IfcFeatureElement", ifc_class="IfcOpeningElement", skip_dialog=True
+            )
 
     def hotkey_S_L(self):
         if AuthoringData.data["active_class"] in ("IfcOpeningElement",):

src/bonsai/bonsai/bim/module/root/operator.py

@@ -360,6 +360,7 @@ class AddElement(bpy.types.Operator, tool.Ifc.Operator):
     is_specific_tool: bpy.props.BoolProperty(default=False, options={"SKIP_SAVE"})
     ifc_product: bpy.props.StringProperty(options={"SKIP_SAVE"})
     ifc_class: bpy.props.StringProperty(options={"SKIP_SAVE"})
+    skip_dialog: bpy.props.BoolProperty(default=False, options={"SKIP_SAVE"})
 
     def invoke(self, context, event):
         return IfcStore.execute_ifc_operator(self, context, event, method="INVOKE")
@@ -380,6 +381,8 @@ class AddElement(bpy.types.Operator, tool.Ifc.Operator):
             props.ifc_product = self.ifc_product
         if self.ifc_class:
             props.ifc_class = self.ifc_class
+        if self.skip_dialog:
+            return self.execute(context)
         return context.window_manager.invoke_props_dialog(self)
 
     def _execute(self, context):

src/bonsai/bonsai/bim/module/root/prop.py

@@ -190,6 +190,7 @@ class BIMRootProperties(PropertyGroup):
 
     if TYPE_CHECKING:
         contexts: str
+        name: str
         description: str
         ifc_product: str
         ifc_class: str

src/bonsai/bonsai/bim/module/void/operator.py

@@ -32,14 +32,16 @@ class AddOpening(bpy.types.Operator, tool.Ifc.Operator):
     bl_label = "Apply Opening"
     bl_options = {"REGISTER", "UNDO"}
     bl_description = (
-        "Apply an Opening object on an Element. "
+        "Apply opening objects to an Element.\n\n"
-        "The Element and the Opening to be applied should be selected. The order of selection is not important"
+        "The Element and the openings to be applied should be selected. The order of selection is not important.\n"
+        "Opening can be just a Blender mesh object."
     )
 
     @classmethod
     def poll(cls, context):
         if len(context.selected_objects) < 2:
             cls.poll_message_set("Select openings and a target element")
+            return False
         return True
 
     def _execute(self, context):

src/bonsai/bonsai/bim/module/void/ui.py

@@ -52,9 +52,8 @@ class BIM_PT_voids(Panel):
         if not VoidsData.is_loaded:
             VoidsData.load()
 
-        if len(context.selected_objects) >= 2:
+        row = self.layout.row(align=True)
-            row = self.layout.row(align=True)
+        op = row.operator("bim.add_opening", icon="ADD", text="Add Opening")
-            op = row.operator("bim.add_opening", icon="ADD", text="Add Opening")
 
         if VoidsData.data["active_opening"]:
             row = self.layout.row()