I cannot say how it's meant to look like but it's obviously broken in some way.

This is a Qt 5.7 issue. Until it is fixed you can access the restore height text box by inserting your cursor inside the Wallet location text box and pressing tab once.
Ran into the same issue, https://github.com/monero-project/monero-gui/pull/2021 should fix that
(you'd have to build the GUI from that branch or wait for a release)
+resolved
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This is a Qt 5.7 issue. Until it is fixed you can access the restore height text box by inserting your cursor inside the
Wallet locationtext box and pressing tab once.