I've placed the Table-Data in the lower Part of the right panel. When i click on a table in the left treeview, the first column in the first row of the selected table gains the focus. When i then type a letter (e.g. in order to scroll to the next match of a table with this letter within the tree), the first element gets edited and the typed letter is inserted.
I think the expected behaviour would be, that typing only changes data in the table, when it has been activated manually with a mouse-click in a cell.