Migration Network modal becomes unresponsive after error on saving.

2.11.0

Always 

Requires a Vcenter provider with at least one EXSI host with multiple network adapters.
1. Navigate to ESXi hosts tab on the Provider detail page on a vSphere provider
2. Click "Select Migration Network"
3. Select a network that would cause an error (Unreachable or wrong credentials)
4. Error will appear
5. Attempt to select a different network, or fix the credentials

Error state will not reset and save button remains disabled after selecting a different network or changing credentials.

Error state would reset after a different network is selected, or after credentials are edited. Validation would run again after save attempt.