Add an accessible title to the panel header

[mlbiche]

When an item has a long name, the text overflow uses an ellipsis, cutting the rest of the name. Sometime, it can be difficult to know if the selected item is the expected one if two items have similar names.

Adding the title attribute allows displaying the complete name on overflow and thus helps the user to know if the selected item if the correct one.

Maybe the same attribute should be applied to items in the result list, so items with similar names can be differentiated while using the search bar or scrolling the item list.