SliderSettingsDialog.ui doesn't need to be executable.
- BugFix 1903: accessing invalid elements should not crash the Java  VM, instead return NULL elements. Also allow all elements to be found by name.
Added code to use Qt Style Sheets mechanism to modify styles.
Used this to address . . .
TeamMeeting2011
Time Course:
  find a way to make it apparent that the feedback widgets are not editable, e.g. use label background, label foreground
-made readOnly lineEdit boxes have gray text and no border.
Fixed Bug 1901. The display of the result of the failed task lead to an
access violation since the result was empty.
The mathematical model now converts discontinuities into events.