Disable ungroup where there are no groups in the selection.

Fixes https://gitlab.com/kicad/code/kicad/issues/9182

pcbnew/footprint_edit_frame.cpp

@@ -1024,11 +1024,23 @@ void FOOTPRINT_EDIT_FRAME::setupUIConditions()
     mgr->SetConditions( ACTIONS::duplicate,              ENABLE( cond.HasItems() ) );
     mgr->SetConditions( ACTIONS::selectAll,              ENABLE( cond.HasItems() ) );
 
+    auto haveAtLeastOneGroupCond =
+            []( const SELECTION& aSel )
+            {
+                for( EDA_ITEM* item : aSel )
+                {
+                    if( item->Type() == PCB_GROUP_T )
+                        return true;
+                }
+
+                return false;
+            };
+
     mgr->SetConditions( PCB_ACTIONS::rotateCw,           ENABLE( cond.HasItems() ) );
     mgr->SetConditions( PCB_ACTIONS::rotateCcw,          ENABLE( cond.HasItems() ) );
     mgr->SetConditions( PCB_ACTIONS::mirror,             ENABLE( cond.HasItems() ) );
     mgr->SetConditions( PCB_ACTIONS::group,              ENABLE( SELECTION_CONDITIONS::MoreThan( 1 ) ) );
-    mgr->SetConditions( PCB_ACTIONS::ungroup,            ENABLE( cond.HasItems() ) );
+    mgr->SetConditions( PCB_ACTIONS::ungroup,            ENABLE( haveAtLeastOneGroupCond ) );
 
     mgr->SetConditions( PCB_ACTIONS::padDisplayMode,     CHECK( !cond.PadFillDisplay() ) );
     mgr->SetConditions( PCB_ACTIONS::textOutlines,       CHECK( !cond.TextFillDisplay() ) );

pcbnew/pcb_edit_frame.cpp

@@ -532,10 +532,22 @@ void PCB_EDIT_FRAME::setupUIConditions()
     mgr->SetConditions( ACTIONS::doDelete, ENABLE( cond.HasItems() ) );
     mgr->SetConditions( ACTIONS::duplicate, ENABLE( cond.HasItems() ) );
 
+    auto haveAtLeastOneGroupCond =
+            []( const SELECTION& aSel )
+            {
+                for( EDA_ITEM* item : aSel )
+                {
+                    if( item->Type() == PCB_GROUP_T )
+                        return true;
+                }
+
+                return false;
+            };
+
     mgr->SetConditions( PCB_ACTIONS::rotateCw, ENABLE( cond.HasItems() ) );
     mgr->SetConditions( PCB_ACTIONS::rotateCcw, ENABLE( cond.HasItems() ) );
     mgr->SetConditions( PCB_ACTIONS::group, ENABLE( SELECTION_CONDITIONS::MoreThan( 1 ) ) );
-    mgr->SetConditions( PCB_ACTIONS::ungroup, ENABLE( cond.HasItems() ) );
+    mgr->SetConditions( PCB_ACTIONS::ungroup, ENABLE( haveAtLeastOneGroupCond ) );
     mgr->SetConditions( PCB_ACTIONS::lock, ENABLE( cond.HasItems() ) );
     mgr->SetConditions( PCB_ACTIONS::unlock, ENABLE( cond.HasItems() ) );