Set questionAsker implicit sizes, set maxWidth to dialog width

Set the size of questionAsker so it won't try to take the smallest amount of space available.

Also make sure text and other elements end at dialog boxes width.

The width has minimum value to make sure the box doesn't get too small inside smaller windows.
Height is calculated from text and footer.

| Before | After |
| ------ | ------ |
|    ![image](/uploads/47fb020ec8f0ba1b47f26d551514edd5/image.png)    |     ![image](/uploads/09363de050911fc19169f2cf3696fdfd/image.png)   |

BUG:480338