Fixed: When editing a table cell, the row lost focus.

Previously, when a table cell was edited, the table thought it had lost focus and displayed the cell's row highlight in an unfocused state.

This fix updates the _isFocused test to include tests for cell editing in both cell-based and view-based tables.

AppKit/CPTableView.j

@@ -3889,7 +3889,9 @@ Your delegate can implement this method to avoid subclassing the tableview to ad
 */
 - (BOOL)_isFocused
 {
-    return [[self window] isKeyWindow] && [[self window] firstResponder] === self;
+    var isEditing = _editingRow !== CPNotFound || _editingCellIndex;
+
+    return [[self window] isKeyWindow] && ([[self window] firstResponder] === self || isEditing);
 }
 
 /*!