Add warning to smearing sizer in fitpage when dq is too large

[butler]

In addressing #1206 it was noted that having the background of the box with the dq/q value (or q for slit smeared), whether read from data or input by the user, turn a pink/red color when the value is "too large" would be helpful. What is needed:

1. Agree what values to use for the cutoff in the various cases (pinhole and slit)
2. add at least a tooltip or provide some obvious text feedback to user of why the box is red and what to do about it
3. Make sure that all the different routes for setting those boxes are covered.