Path: Update for inter-panel visibility updates

Also, clear`singleStep` and `value` properties for `StepOver` spinBox in UI panel.

src/Mod/Path/Gui/Resources/panels/PageOpWaterlineEdit.ui

@@ -194,12 +194,6 @@
         <property name="maximum">
          <number>100</number>
         </property>
-        <property name="singleStep">
-         <number>10</number>
-        </property>
-        <property name="value">
-         <number>100</number>
-        </property>
        </widget>
       </item>
       <item row="2" column="0">

src/Mod/Path/PathScripts/PathWaterlineGui.py

@@ -107,8 +107,8 @@ class TaskPanelOpPage(PathOpGui.TaskPanelPage):
 
         return signals
 
-    def updateVisibility(self):
-        '''updateVisibility()... Updates visibility of Tasks panel objects.'''
+    def updateVisibility(self, sentObj=None):
+        '''updateVisibility(sentObj=None)... Updates visibility of Tasks panel objects.'''
         Algorithm = self.form.algorithmSelect.currentText()
         self.form.optimizeEnabled.hide()  # Has no independent QLabel object