Terry,
There is nothing configurable for this but with some minor code changes you can achieve this.
1. Open your apps main config.json and find your "groups" array under the group you will find "widgets" array add "folded": true to the widgets you want folded at startup.
2. Open [install dir]\server\apps\[app num]\themes\FoldableTheme\panels\FoldablePanel\Panel.js and find the createFrame function. Add modify this block to add line 4.
frame = new FoldableWidgetFrame({
label: widgetConfig.label,
widgetManager: this.widgetManager,
folded: widgetConfig.folded
});