Callable when closing a tab

**Is your feature request related to a problem? Please describe.**
When closing a tab, a callback should be available in order to delete model data

**Describe the solution you'd like**
Currently i have to close the tab through another button that has a callback however, this is not UX friendly

**Describe alternatives you've considered**
There is a `closable` argument in tabs which should make a callable available

**Additional context**
This issue has already been opened and flagged as pending tough the issue has been closed. https://github.com/hoffstadt/DearPyGui/issues/1758