SharedSizeGroup and Visibility.Collapsed

* .NET Core Version: 3.0
* Windows version: 1803 (17763.437)
* Does the bug reproduce also in WPF for .NET Framework 4.8?: Yes

**Problem description:**

https://stackoverflow.com/questions/9977344/grid-column-with-sharedsizegroup-does-not-reclaim-the-size-when-it-is-collapse

> I have the following xaml:
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> ```xaml
> xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
> xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
> Title="MainWindow" Height="350" Width="525">
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> When you try this, the initial state the first column is 100 wide. When the button is pressed and the second grid is made visible, the first column is made 200 wide. However, when you press the button again, the column will still be 200 wide.

Apparently, it works with Visibility.Hidden but it doesn't with Visibility.Collapsed. Columns/rows don't get remeasured.