Modify table collaps menu?


I have a question and wanted to see if anyone else is familiar with it.

I have a table with a quite big volume of columns and using the Vaadin collapsible feature seems like a good idea. However, I’m not totally satisfied with its standard behaviour and layout. First and foremost I would like to have a tool tip that occurs when the user moves the pointer over the feature button describing that it provides the possibility of collapsing and expanding columns. And I would also like the generic menu for choosing columns to collapse to stay up when a column has been chosen for collapse, and disappear when the user clicks outside the menu.

So… my question really is if anyone knows where I can get a hold of this feature and possibly overwrite it with my own version…? Any help would be greatly appreciated!