Add set starting view button

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

includes/GlModelHooks.php

@@ -97,11 +97,17 @@ class GlModelHooks {
             'onclick' => 'downloadImage("' . $title . '")'
         );
 
+        $orbButtonAttr = array(
+            'class' => 'preview-button SetOrbit',
+            'onclick' => 'writeCameraOrbit()'
+        );
+
         $addHsButton = array(
             Html::rawElement('button',$addButtonAttr,'Add a new hotspot'),
             Html::rawElement('button',$readButtonAttr,'Update hotspots'),
             Html::rawElement('button',$delButtonAttr,'Delete hotspot'),
-            Html::rawElement('button',$dldButtonAttr,'Download image')
+            Html::rawElement('button',$dldButtonAttr,'Download image'),
+            Html::rawElement('button',$orbButtonAttr,'Set start view')
         );
 
         $previewHTML = Html::rawElement('div',NULL,$previewViewer.implode($addHsButton));