[BUG] Fix CheckForUpdatesDialog dpi scaling for button

high dpi, check updates dialog, the "OK" has wrong size
![ok not sized correct](https://user-images.githubusercontent.com/52528841/183299491-68160627-aa02-42a8-b8ed-ce13eab8b139.png)
