Align checkboxes with dropdown in a TbGridView td collumn

Hello everyone,

I’m desperatelly trying to align a checkbox on the right side of a dropdown on the same line of a TbGridView table.
The dropdown and checkbox are concatenated as a return of a function, giving the value of that collumn.
I tried lots of tips and advices on the internet and nothing seems to put that checkbox in-line with the dropdown. It keeps getting on the next line no matter what I try.

Please help me!
Much apreciated!