Add view config selection to preview editor

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

modules/glmv-prev.js

@@ -152,8 +152,29 @@ const setLims = new OO.ui.PopupButtonWidget({
 })
 setLims.setDisabled(true)
 
+const setViewConfig = [...Object.keys(origMetadata.viewerConfig)]
+let setViewItems = []
+setViewConfig.forEach(opt => {
+    setViewItems.push(new OO.ui.MenuOptionWidget({data: opt, label: opt}))
+})
+
+const selectVC = new OO.ui.ButtonMenuSelectWidget({
+	icon: 'eye',
+	label: 'Select view configuration',
+	invisibleLabel: true,
+	menu: {
+		items: setViewItems,
+        width: 'min-content'
+    },
+    $overlay: $('#bodyContent')
+})
+selectVC.getMenu().on( 'choose', selSet => {
+    selectViewConfig(selSet.data)
+})
+selectVC.setDisabled(true)
+
 const cameraButtons = new OO.ui.ButtonGroupWidget({
-    items: [ downloadViewerImage, setControl, setView, setLims ]
+    items: [ downloadViewerImage, setControl, setView, setLims, selectVC ]
 })
 
 //Main Menu