CRC server adapter: push secret path is not remembered & prefilled

Steps:

1. EXEC: launch server wizard: New > Other > Server > Server > "Red Hat CodeReady Containers 1.0 (Tech Preview)", inform "CRC Binary:" & "CRC Pull Secret File:"
2. EXEC: hit "Cancel"
3. EXEC: launch server wizard again, "Next" to get to the form with the "CRC Binary" and "CRC Pull Secret File"

Result:
"CRC Binary:" was remembered and is now prefilled, "CRC Pull Secret File:" is not.