mat-select is scrolling up when selecting

[Merwan1010]

Reproduction

StackBlitz issue

Steps to reproduce:

1. Change the height of mat-option to unset;
2. Scroll down and select a value

Expected Behavior

The mat-select component shouldn't be scrolling up when selecting a value.

Actual Behavior

The component scroll up when selecting a value.

Environment

• Angular : 8.1.3
• CDK/Material: Angular Material design
• Browser(s): Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): MacOS Mojave 10.14

[crisbeto]

The select expects options to be of a certain height and we currently don't support overriding it so you're doing it at your own risk.

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