Make Spinners commit on loss of focus
Make Spinners commit on loss of focus

This change is an attempt to fix the design flaw in Spinner that requires edits to be committed by pressing Enter (and no other way).

The technique comes from this answer in Stack Overflow, and seems to work well. https://stackoverflow.com/a/39380146

edvin/tornadofx,edvin/tornadofx,nimakro/tornadofx,nimakro/tornadofx