Remove EDIT_TOOL's quasi-global BOARD_COMMIT.

It had several encapsulation leakage issues, as well as poorly-defined
behaviour of undo for chained-actions (append-to-board, and then rotate
while moving, for instance).

pcbnew/board_commit.cpp

@@ -571,6 +571,8 @@ void BOARD_COMMIT::Push( const wxString& aMessage, int aCommitFlags )
             wxASSERT( false );
             break;
         }
+
+        boardItem->ClearEditFlags();
     }
 
     if( bulkAddedItems.size() > 0 )
@@ -767,6 +769,8 @@ void BOARD_COMMIT::Revert()
             wxASSERT( false );
             break;
         }
+
+        item->ClearEditFlags();
     }
 
     if( bulkAddedItems.size() > 0 )
@@ -787,6 +791,9 @@ void BOARD_COMMIT::Revert()
     PCB_SELECTION_TOOL* selTool = m_toolMgr->GetTool<PCB_SELECTION_TOOL>();
     selTool->RebuildSelection();
 
+    // Property panel needs to know about the reselect
+    m_toolMgr->PostEvent( EVENTS::SelectedItemsModified );
+
     clear();
 }