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/po_line_detail.dart

@@ -67,7 +67,7 @@ class _POLineDetailWidgetState extends RefreshableState<POLineDetailWidget> {
       if (!widget.item.isComplete) {
         buttons.add(
           SpeedDialChild(
-            child: Icon(TablerIcons.transition_right, color: Colors.blue),
+            child: Icon(TablerIcons.transition_right, color: COLOR_ACTION),
             label: L10().receiveItem,
             onTap: () async {
               receiveLineItem(context);