igx-toast position input is not working properly

[gmartinezig]

Description

When the "position" input value is set to "top", the toast component is shown at the bottom anyway.

Steps to reproduce

Result

The "position" value is ignored.

Expected result

The toast should be placed at top

Workaround

It can be solved setting a value to the "positionSettings" directly instead of setting the "position" value.

Observations

It seems like the "positionSettings" value is initialized internally before the "position" value is set, so it keeps its default "position" value forever. The set of the "position" input is not updating the "positionSettings" vertical direction dinamically.