ctrl_panel: Reformat SpinBox text always if valid

The parameter SpinBoxes previously would only update if the interpreted
value was changed, missing cases where the text would have changed but
the value stays the same, e.g. removing trailing decimal zeros.

pytec/pytec/gui/view/unitful.py

@@ -91,6 +91,24 @@ class UnitfulSpinBox(SpinBox):
 
         super().setOpts(**opts)
 
+    def editingFinishedEvent(self):
+        # Modified from pyqtgraph.SpinBox.editingFinishedEvent source
+
+        new_text = self.lineEdit().text()
+        if new_text == self.lastText:
+            return
+        try:
+            val = self.interpret()
+        except Exception:
+            return
+
+        if val is False:
+            return
+        if val == self.val:
+            self.updateText()  # still update text so that values are reformatted pretty-like
+            return
+        self.setValue(val, delaySignal=False)  ## allow text update so that values are reformatted pretty-like
+
     def formatText(self, prev=None):
         """
         In addition to pyqtgraph.SpinBox's formatting, incorporate the