move some slider styling into fxml file to fix sample viewer display (#540)

Author: jenmerritt

scene/surface-placement/src/main/resources/surface_placement/main.fxml

@@ -47,7 +47,7 @@
             <Insets topRightBottomLeft="10"/>
         </StackPane.margin>
         <Label fx:id="zValueSliderLabel" text="Z-Value: "/>
-        <Slider fx:id="zValueSlider" min="0" max="150" value="70" onMouseDragged="#changeZValue"
-                onMouseReleased="#changeZValue"/>
+        <Slider fx:id="zValueSlider" showTickLabels="true" showTickMarks="true" majorTickUnit="50" minorTickCount="1"
+                min="0" max="150" value="70" onMouseDragged="#changeZValue" onMouseReleased="#changeZValue"/>
     </VBox>
 </StackPane>

scene/surface-placement/src/main/resources/surface_placement/style.css

@@ -27,10 +27,6 @@
 .slider-controls .slider {
   -fx-orientation: vertical;
   -fx-pref-height:160;
-  -fx-show-tick-marks: true;
-  -fx-show-tick-labels: true;
-  -fx-major-tick-unit: 50;
-  -fx-minor-tick-count: 1;
 }
 
 .slider-controls .slider .axis {