Fix #17412 Sorting fixed, no troubles when editing after sorting

Issue was, that the cellchange is triggered at re-sorting - so we need to check the names
Following issue was, that when removing or renaming something in re-sorted table - so there was a bug that referenced to the row instead of the index
Thought about to remove mIndexedWidgets completely, but when renumbering after delete in unsorted table, we cannot reference to the row order.

Author: signedav

src/app/qgssourcefieldsproperties.cpp

@@ -142,6 +142,7 @@ void QgsSourceFieldsProperties::attributeAdded( int idx )
   setRow( row, idx, fields.at( idx ) );
   mFieldsList->setCurrentCell( row, idx );
 
+  //in case there are rows following, there is increased the id to the correct ones
   for ( int i = idx + 1; i < mIndexedWidgets.count(); i++ )
     mIndexedWidgets.at( i )->setData( Qt::DisplayRole, i );
 
@@ -154,15 +155,15 @@ void QgsSourceFieldsProperties::attributeAdded( int idx )
     {
       case QgsFields::OriginExpression:
         if ( i == 7 ) continue;
-        mFieldsList->item( idx, i )->setBackgroundColor( QColor( 200, 200, 255 ) );
+        mFieldsList->item( row, i )->setBackgroundColor( QColor( 200, 200, 255 ) );
         break;
 
       case QgsFields::OriginJoin:
-        mFieldsList->item( idx, i )->setBackgroundColor( QColor( 200, 255, 200 ) );
+        mFieldsList->item( row, i )->setBackgroundColor( QColor( 200, 255, 200 ) );
         break;
 
       default:
-        mFieldsList->item( idx, i )->setBackgroundColor( QColor( 255, 255, 200 ) );
+        mFieldsList->item( row, i )->setBackgroundColor( QColor( 255, 255, 200 ) );
         break;
     }
   }
@@ -367,16 +368,19 @@ void QgsSourceFieldsProperties::attributesListCellChanged( int row, int column )
 {
   if ( column == AttrNameCol && mLayer && mLayer->isEditable() )
   {
+    int idx = mIndexedWidgets.indexOf( mFieldsList->item( row, AttrIdCol ) );
+
     QTableWidgetItem *nameItem = mFieldsList->item( row, column );
+    //avoiding that something will be changed, just because this is triggered by simple re-sorting
     if ( !nameItem ||
          nameItem->text().isEmpty() ||
          !mLayer->fields().exists( row ) ||
-         mLayer->fields().at( mFieldsList->item( row, AttrIdCol )->text().toInt() ).name() == nameItem->text()
+         mLayer->fields().at( idx ).name() == nameItem->text()
        )
       return;
 
     mLayer->beginEditCommand( tr( "Rename attribute" ) );
-    if ( mLayer->renameAttribute( row,  nameItem->text() ) )
+    if ( mLayer->renameAttribute( idx,  nameItem->text() ) )
     {
       mLayer->endEditCommand();
     }