Minor UI cleanup (#313)

* Adjust tab-order of widgets to follow a logical spatial order.  (#309)
* Remove default attribute from Print button in PrintView.  (#308)

glabels/ui/TemplateDesignerOneLayoutPage.ui

@@ -132,7 +132,11 @@
    <item row="0" column="1" rowspan="2">
     <layout class="QVBoxLayout" name="verticalLayout">
      <item>
-      <widget class="glabels::SimplePreview" name="preview"/>
+      <widget class="glabels::SimplePreview" name="preview">
+       <property name="interactive">
+        <bool>false</bool>
+       </property>
+      </widget>
      </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout">
@@ -161,7 +165,8 @@
           <string>Print test sheet</string>
          </property>
          <property name="icon">
-          <iconset theme="glabels-print"/>
+          <iconset theme="glabels-print">
+           <normaloff>.</normaloff>.</iconset>
          </property>
          <property name="iconSize">
           <size>