[4.0.0-beta.17] Expand full button with wrap option

[paulstelzer]

Describe the Bug
Sometimes it's necessary to wrap the text of a button because you want to have a long text on this button. If the button is expand="full" or expand="block", this will not working

Steps to Reproduce
Add the following css:

ion-button.wrap {
    white-space: normal;
    --height: auto;
}

And the button is this:

v1:

<ion-button expand="full" class="wrap">
Imagine a very long text here that is very long and will need more than one line
</ion-button>

v2:

<ion-button expand="block" class="wrap">
Imagine a very long text here
</ion-button>

This will lead to (on Chrome):

Related Code
Problem is the following: contain: strict; on full and block

Expected Behavior
The text should be shown correctly

[manucorporat]

Fixed by 802a3d1!

[ionitron-bot]

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