Causes the minimum and/or natural height to grow if the new proposed sizes exceed the current minimum and natural height.
This is used by `GtkCellAreaContext` implementations during the request process over a series of `GtkTreeModel` rows to progressively push the requested height over a series of get_preferred_height requests.
| this |
a `GtkCellAreaContext` |
| minimum_height |
the proposed new minimum height for this |
| natural_height |
the proposed new natural height for this |