Fix double disambiguation menu when removing footprints

Second disambiguation menu was caused by another call to
SELECTION_TOOL::RequestSelection() meant to get the list of
connected tracks. When there were only footprints under the cursor,
it asked the user again to pick an item to remove.

Fixes: lp:1748521
* https://bugs.launchpad.net/kicad/+bug/1748521

include/tool/selection.h

@@ -168,6 +168,23 @@ public:
         return nullptr;
     }
 
+    /**
+     * Checks if there is at least one item of requested kind.
+     *
+     * @param aType is the type to check for.
+     * @return True if there is at least one item of such kind.
+     */
+    bool HasType( KICAD_T aType ) const
+    {
+        for( auto item : m_items )
+        {
+            if( item->Type() == aType )
+                return true;
+        }
+
+        return false;
+    }
+
     virtual const VIEW_GROUP::ITEMS updateDrawList() const override;
 
     bool HasReferencePoint() const

pcbnew/tools/edit_tool.cpp

@@ -843,29 +843,26 @@ int EDIT_TOOL::Remove( const TOOL_EVENT& aEvent )
     if( m_selectionTool->CheckLock() == SELECTION_LOCKED )
         return 0;
 
-    if( selection.Empty() )
-        return 0;
-
     // is this "alternative" remove?
-    const bool isAlt = aEvent.Parameter<intptr_t>() ==
-            (int) PCB_ACTIONS::REMOVE_FLAGS::ALT;
+    const bool isAlt = aEvent.Parameter<intptr_t>() == (int) PCB_ACTIONS::REMOVE_FLAGS::ALT;
 
-    // in "alternative" mode, deletion is not just a simple list
-    // of selected items, it is:
-    //   - whole tracks, not just segments
-    if( isAlt && selection.IsHover() )
+    // in "alternative" mode, deletion is not just a simple list of selected items,
+    // it removes whole tracks, not just segments
+    if( isAlt && selection.IsHover()
+            && ( selection.HasType( PCB_TRACE_T ) || selection.HasType( PCB_VIA_T ) ) )
     {
         m_toolMgr->RunAction( PCB_ACTIONS::selectConnection, true );
         selection = m_selectionTool->RequestSelection( SELECTION_DELETABLE | SELECTION_SANITIZE_PADS );
     }
 
+    if( selection.Empty() )
+        return 0;
+
     // As we are about to remove items, they have to be removed from the selection first
     m_toolMgr->RunAction( PCB_ACTIONS::selectionClear, true );
 
     for( auto item : selection )
-    {
         m_commit->Remove( item );
-    }
 
     m_commit->Push( _( "Delete" ) );