UI updates (#849)

* Updated dashboard

- Display "outstanding" badges
- Display "overdue" badges
- Pull-to-refresh

* Remove dead code

* Refactor app colors

* Add "pending shipments" icon

* Remove custom spinner

* Refactor error dialog

* Updated redirect after login

* Refactor login/account pages

- Better UX and confirmation messages

* Refactor API error messages

* Improve token management

- Secure storage
- Handle session expiry
- Per-profile HTTPS certificate checks

* Improved error messages

lib/widget/order/so_line_detail.dart

@@ -111,7 +111,7 @@ class _SOLineDetailWidgetState extends RefreshableState<SoLineDetailWidget> {
     if (order != null && order!.isOpen) {
       buttons.add(
         SpeedDialChild(
-          child: Icon(TablerIcons.transition_right, color: Colors.blue),
+          child: Icon(TablerIcons.transition_right, color: COLOR_ACTION),
           label: L10().allocateStock,
           onTap: () async {
             _allocateStock(context);