Tweak loading indicator to start with indeterminant spinner until progress has started.

lib/ui/common/controls/app_loading_indicator.dart

@@ -7,14 +7,16 @@ class AppLoadingIndicator extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final progress = (value == null || value! < .05) ? null : value;
+
     return SizedBox(
-        width: 40,
-        height: 40,
-        child: CircularProgressIndicator(
-          color: color ?? $styles.colors.accent1,
-          value: value,
-          strokeWidth: 1.0,
-        ),
-      );
+      width: 40,
+      height: 40,
+      child: CircularProgressIndicator(
+        color: color ?? $styles.colors.accent1,
+        value: progress,
+        strokeWidth: 1.0,
+      ),
+    );
   }
 }