Issue #1450: adjust SQL Schema column in DB Schema dock to content

The SQL Schema column in DB Schema dock is set to resize automatically
to adjust to the content, like it is already done for the same column in
the Database Structure tab.

src/MainWindow.cpp

@@ -477,6 +477,7 @@ void MainWindow::populateStructure(const QString& old_table)
 
     // Resize SQL column to fit contents
     ui->dbTreeWidget->resizeColumnToContents(3);
+    ui->treeSchemaDock->resizeColumnToContents(3);
 }
 
 void MainWindow::clearTableBrowser()