tiOPF: Fix StringGrid mediator last column sizing bug
tiOPF: Fix StringGrid mediator last column sizing bug

* The last column was already resized to whatever space is available
  ignoring the developers preferred (minimum) size. Now the last
  column in grows in size, not shrink.

wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI